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<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
<channel>
<title>WeepingDogel</title>
<link>http://weepingdogel.github.io/</link>
<description>Learning for happiness.</description>
<generator>Hugo -- gohugo.io</generator><language>en</language><managingEditor>[email protected] (WeepingDogel)</managingEditor>
<webMaster>[email protected] (WeepingDogel)</webMaster><lastBuildDate>Tue, 05 Mar 2024 16:14:35 +0800</lastBuildDate>
<atom:link href="http://weepingdogel.github.io/index.xml" rel="self" type="application/rss+xml" />
<item>
<title>A Simple Client Server Project Made by Python and Vue3</title>
<link>http://weepingdogel.github.io/posts/a-simple-client-server-project-made-by-python-and-vue3/</link>
<pubDate>Tue, 05 Mar 2024 16:14:35 +0800</pubDate>
<author>WeepingDogel</author>
<guid>http://weepingdogel.github.io/posts/a-simple-client-server-project-made-by-python-and-vue3/</guid>
<description><![CDATA[<div class="featured-image">
<img src="/img/2024-03-05-13-08-30%e5%b1%8f%e5%b9%95%e6%88%aa%e5%9b%be.png" referrerpolicy="no-referrer">
</div><h1 id="introduction">Introduction</h1>
<p></p>
<p>This demo will show a user list with avatar, username and description, which is the data fetched from the backend.
At first, the client page made by vue3 will send a request to the server, then the server respond and transfer a JSON typed data.
Then the clinet page accepts this data, and render a page.</p>
<h1 id="backend">Backend</h1>
<p>There’s a HTTP service powered by <a href="https://fastapi.tiangolo.com/" target="_blank" rel="noopener noreffer ">FastAPI</a>, which is a high performance web framework for Python.</p>
<p></p>
<p>When started, it will read the json file <code>user_list.json</code> into the RAM as a variable.</p>
<p></p>
<p></p>
<p>When received a HTTP request by the URL <code>/userdata/list</code> from any clinet, it will read the JSON data in RAM and send to the client.</p>
<p>Here is the JSON file.</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
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</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-json" data-lang="json"><span class="line"><span class="cl"><span class="p">[</span>
</span></span><span class="line"><span class="cl"> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"id"</span><span class="p">:</span> <span class="mi">1</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"name"</span><span class="p">:</span> <span class="s2">"WeepingDogel"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"type"</span><span class="p">:</span> <span class="s2">"dog"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"age"</span><span class="p">:</span> <span class="mi">20</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"avatar"</span><span class="p">:</span> <span class="s2">"/static/WeepingDogel.jpg"</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"id"</span><span class="p">:</span> <span class="mi">2</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"name"</span><span class="p">:</span> <span class="s2">"kira-pgr"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"type"</span><span class="p">:</span> <span class="s2">"cat"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"age"</span><span class="p">:</span> <span class="mi">18</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"avatar"</span><span class="p">:</span> <span class="s2">"/static/kira-pgr.png"</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"id"</span><span class="p">:</span> <span class="mi">3</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"name"</span><span class="p">:</span> <span class="s2">"kara"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"type"</span><span class="p">:</span> <span class="s2">"cat"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"age"</span><span class="p">:</span> <span class="mi">19</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"avatar"</span><span class="p">:</span> <span class="s2">"/static/kara.jpg"</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"id"</span><span class="p">:</span> <span class="mi">4</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"name"</span><span class="p">:</span> <span class="s2">"Felix Yan"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"type"</span><span class="p">:</span> <span class="s2">"fox(?)"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"age"</span><span class="p">:</span> <span class="mi">30</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"avatar"</span><span class="p">:</span> <span class="s2">"/static/felix.jpg"</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"id"</span><span class="p">:</span> <span class="mi">5</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"name"</span><span class="p">:</span> <span class="s2">"Old Herl"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"type"</span><span class="p">:</span> <span class="s2">"cat"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"age"</span><span class="p">:</span> <span class="mi">400</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"avatar"</span><span class="p">:</span> <span class="s2">"/static/old_herl.jpg"</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"id"</span><span class="p">:</span> <span class="mi">6</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"name"</span><span class="p">:</span> <span class="s2">"Episode 33"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"type"</span><span class="p">:</span> <span class="s2">"-/@”～、"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"age"</span><span class="p">:</span> <span class="mi">17</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nt">"avatar"</span><span class="p">:</span> <span class="s2">"/static/episode-33.jpg"</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">]</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Let’s start to code. Firstly, we need to create a virtual environment of Python and import the fastapi package.</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ python -m venv venv
</span></span></code></pre></td></tr></table>
</div>
</div><p>Install the fastapi libraries by <code>pip</code> and establish a root API URL to run a web server.</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ pip install "fastapi[all]"
</span></span></code></pre></td></tr></table>
</div>
</div><div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
</span><span class="lnt"> 2
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="c1"># encoding=UTF-8</span>
</span></span><span class="line"><span class="cl"><span class="c1"># filename=main.py</span>
</span></span><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">fastapi</span> <span class="kn">import</span> <span class="n">FastAPI</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="n">app</span> <span class="o">=</span> <span class="n">FastAPI</span><span class="p">()</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="nd">@app.get</span><span class="p">(</span><span class="s1">'/'</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="k">async</span> <span class="k">def</span> <span class="nf">root</span><span class="p">():</span>
</span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="p">{</span><span class="s2">"message"</span><span class="p">:</span> <span class="s2">"Hello"</span><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>While the client recevied the data to render the page, it will still access the server to get the static files.
So let’s mount the staitc directory.</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
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</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ ls src/static/ -lh
</span></span><span class="line"><span class="cl">总计 396K
</span></span><span class="line"><span class="cl">-rw-r--r-- 1 weepingdogel weepingdogel 89K 3月 3日 18:51 episode-33.jpg
</span></span><span class="line"><span class="cl">-rw-r--r-- 1 weepingdogel weepingdogel 87K 3月 3日 18:35 felix.jpg
</span></span><span class="line"><span class="cl">-rw-r--r-- 1 weepingdogel weepingdogel 45K 3月 3日 15:52 kara.jpg
</span></span><span class="line"><span class="cl">-rw-r--r-- 1 weepingdogel weepingdogel 93K 12月18日 11:34 kira-pgr.png
</span></span><span class="line"><span class="cl">-rw-r--r-- 1 weepingdogel weepingdogel 36K 3月 3日 18:37 old_herl.jpg
</span></span><span class="line"><span class="cl">-rw-r--r-- 1 weepingdogel weepingdogel 34K 1月 6日 16:20 WeepingDogel.jpg
</span></span></code></pre></td></tr></table>
</div>
</div><p>Add these to <code>main.py</code>.</p>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">fastapi.staticfiles</span> <span class="kn">import</span> <span class="n">StaticFiles</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="n">app</span><span class="o">.</span><span class="n">mount</span><span class="p">(</span><span class="s1">'/static'</span><span class="p">,</span> <span class="n">StaticFiles</span><span class="p">(</span><span class="n">directory</span><span class="o">=</span><span class="s2">"src/static"</span><span class="p">),</span> <span class="n">name</span><span class="o">=</span><span class="s2">"static"</span><span class="p">)</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Then we need to create a router <code>/userdata</code> by create a new file <code>router_userdata.py</code> in other direcotries or just in the same directory.</p>
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<pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="c1"># encoding=UTF-8</span>
</span></span><span class="line"><span class="cl"><span class="c1"># filename=router_resources.py</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">fastapi</span> <span class="kn">import</span> <span class="n">APIRouter</span>
</span></span><span class="line"><span class="cl"><span class="kn">import</span> <span class="nn">json</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="n">userdata_router</span> <span class="o">=</span> <span class="n">APIRouter</span><span class="p">(</span>
</span></span><span class="line"><span class="cl"> <span class="n">prefix</span><span class="o">=</span><span class="s1">'/userdata'</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="n">tags</span><span class="o">=</span><span class="p">[</span><span class="s1">'userdata'</span><span class="p">],</span>
</span></span><span class="line"><span class="cl"> <span class="n">responses</span><span class="o">=</span><span class="p">{</span><span class="mi">404</span><span class="p">:</span> <span class="p">{</span><span class="s2">"Description"</span><span class="p">:</span> <span class="s2">"Not Found"</span><span class="p">}}</span>
</span></span><span class="line"><span class="cl"><span class="p">)</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Now we need to open the json file and store the content into the memory as a variable.</p>
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<pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="n">user_list</span><span class="p">:</span> <span class="nb">list</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="nb">open</span><span class="p">(</span><span class="s1">'src/data/user_list.json'</span><span class="p">)</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Finally we create a URL router to provide the API to get the data.</p>
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<pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="c1"># encoding=UTF-8</span>
</span></span><span class="line"><span class="cl"><span class="c1"># filename=router_resources.py</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">fastapi</span> <span class="kn">import</span> <span class="n">APIRouter</span>
</span></span><span class="line"><span class="cl"><span class="kn">import</span> <span class="nn">json</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="n">userdata_router</span> <span class="o">=</span> <span class="n">APIRouter</span><span class="p">(</span>
</span></span><span class="line"><span class="cl"> <span class="n">prefix</span><span class="o">=</span><span class="s1">'/userdata'</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="n">tags</span><span class="o">=</span><span class="p">[</span><span class="s1">'userdata'</span><span class="p">],</span>
</span></span><span class="line"><span class="cl"> <span class="n">responses</span><span class="o">=</span><span class="p">{</span><span class="mi">404</span><span class="p">:</span> <span class="p">{</span><span class="s2">"Description"</span><span class="p">:</span> <span class="s2">"Not Found"</span><span class="p">}}</span>
</span></span><span class="line"><span class="cl"><span class="p">)</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="n">user_list</span><span class="p">:</span> <span class="nb">list</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="nb">open</span><span class="p">(</span><span class="s1">'src/data/user_list.json'</span><span class="p">)</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="nd">@userdata_router.get</span><span class="p">(</span><span class="s1">'/list'</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">read_user_list</span><span class="p">():</span>
</span></span><span class="line"><span class="cl"> <span class="s2">"""
</span></span></span><span class="line"><span class="cl"><span class="s2"> Read a user list from a json file.
</span></span></span><span class="line"><span class="cl"><span class="s2"> :return: A user list.
</span></span></span><span class="line"><span class="cl"><span class="s2"> """</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="n">user_list</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Now start the server by uvicorn.</p>
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<pre tabindex="0" class="chroma"><code class="language-gdscript3" data-lang="gdscript3"><span class="line"><span class="cl"><span class="n">uvicorn</span> <span class="n">src</span><span class="o">.</span><span class="n">main</span><span class="p">:</span><span class="n">app</span> <span class="o">--</span><span class="n">reload</span>
</span></span></code></pre></td></tr></table>
</div>
</div><h1 id="frontend">FrontEnd</h1>
<p>Now it’s the work that frontend must be responsible. Let’s create a vue3 project by yarn at first.</p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ yarn create vue
</span></span></code></pre></td></tr></table>
</div>
</div><p>Then delete the components before, we don’t need them in this demo.
Just rewrite the code of the <code>App.vue</code>.</p>
<p>Before we send a request to fetch the data, we need to define two types to contain the data if <strong>Typescript</strong> is enabled.</p>
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<pre tabindex="0" class="chroma"><code class="language-typescript" data-lang="typescript"><span class="line"><span class="cl"><span class="kr">type</span> <span class="nx">User</span> <span class="o">=</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">id</span>: <span class="kt">Number</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">name</span>: <span class="kt">string</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">user_type</span>: <span class="kt">string</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">age</span>: <span class="kt">Number</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">avatar</span>: <span class="kt">string</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">};</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kr">type</span> <span class="nx">UserList</span> <span class="o">=</span> <span class="nx">User</span><span class="p">[];</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>According to the <a href="https://vuejs.org/api/options-state.html" target="_blank" rel="noopener noreffer ">lifecycle</a> of Vue3, a method need to be create and used in the <code>mount</code> lifecycle.
We have to define a global variable in <code>data()</code> state and a synchronous function in <code>methods</code> state.</p>
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<pre tabindex="0" class="chroma"><code class="language-vue" data-lang="vue"><span class="line"><span class="cl"><span class="kr">export</span> <span class="k">default</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">data</span><span class="p">()</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">user_list</span><span class="o">:</span> <span class="p">[]</span> <span class="nx">as</span> <span class="nx">UserList</span>
</span></span><span class="line"><span class="cl"> <span class="p">};</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="nx">methods</span><span class="o">:</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">async</span> <span class="nx">GetUserList</span><span class="p">()</span> <span class="p">{},</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"><span class="p">};</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Now we need to send a request by <code>axios</code>.</p>
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<pre tabindex="0" class="chroma"><code class="language-typescript" data-lang="typescript"><span class="line"><span class="cl"><span class="kr">import</span> <span class="nx">axios</span> <span class="kr">from</span> <span class="s2">"axios"</span><span class="p">;</span>
</span></span></code></pre></td></tr></table>
</div>
</div><div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code><span class="lnt">1
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<pre tabindex="0" class="chroma"><code class="language-typescript" data-lang="typescript"><span class="line"><span class="cl"><span class="kr">async</span> <span class="nx">GetUserList() {</span>
</span></span><span class="line"><span class="cl"> <span class="k">try</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="kr">const</span> <span class="nx">response</span> <span class="o">=</span> <span class="k">await</span> <span class="nx">axios</span><span class="p">.</span><span class="kr">get</span><span class="p"><</span><span class="nt">UserList</span><span class="p">>(</span><span class="s2">"/userdata/list"</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"> <span class="k">this</span><span class="p">.</span><span class="nx">user_list</span> <span class="o">=</span> <span class="nx">response</span><span class="p">.</span><span class="nx">data</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span> <span class="k">catch</span> <span class="p">(</span><span class="nx">error</span><span class="p">)</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">error</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">},</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Then we need to run this function in <code>mount</code> lifecycle.</p>
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<pre tabindex="0" class="chroma"><code class="language-vue" data-lang="vue"><span class="line"><span class="cl"><span class="nx">mounted</span><span class="p">()</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">this</span><span class="p">.</span><span class="nx">GetUserList</span><span class="p">();</span>
</span></span><span class="line"><span class="cl"><span class="p">},</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Here’s the completed code in <code><script></code> tag:</p>
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<pre tabindex="0" class="chroma"><code class="language-typescript" data-lang="typescript"><span class="line"><span class="cl"><span class="kr">import</span> <span class="nx">axios</span> <span class="kr">from</span> <span class="s2">"axios"</span><span class="p">;</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kr">type</span> <span class="nx">User</span> <span class="o">=</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">id</span>: <span class="kt">Number</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">name</span>: <span class="kt">string</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">user_type</span>: <span class="kt">string</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">age</span>: <span class="kt">Number</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="nx">avatar</span>: <span class="kt">string</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">};</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kr">type</span> <span class="nx">UserList</span> <span class="o">=</span> <span class="nx">User</span><span class="p">[];</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kr">export</span> <span class="k">default</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">data() {</span>
</span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">user_list</span><span class="o">:</span> <span class="p">[]</span> <span class="kr">as</span> <span class="nx">UserList</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="p">};</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="nx">methods</span><span class="o">:</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="kr">async</span> <span class="nx">GetUserList() {</span>
</span></span><span class="line"><span class="cl"> <span class="k">try</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="kr">const</span> <span class="nx">response</span> <span class="o">=</span> <span class="k">await</span> <span class="nx">axios</span><span class="p">.</span><span class="kr">get</span><span class="p"><</span><span class="nt">UserList</span><span class="p">>(</span><span class="s2">"/userdata/list"</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"> <span class="k">this</span><span class="p">.</span><span class="nx">user_list</span> <span class="o">=</span> <span class="nx">response</span><span class="p">.</span><span class="nx">data</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span> <span class="k">catch</span> <span class="p">(</span><span class="nx">error</span><span class="p">)</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">error</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"> <span class="nx">mounted() {</span>
</span></span><span class="line"><span class="cl"> <span class="k">this</span><span class="p">.</span><span class="nx">GetUserList</span><span class="p">();</span>
</span></span><span class="line"><span class="cl"> <span class="p">},</span>
</span></span><span class="line"><span class="cl"><span class="p">};</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p><a href="https://vuejs.org/guide/extras/render-function.html#v-for" target="_blank" rel="noopener noreffer ">Render</a> the data in Template by ‘v-for’ property.</p>
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</span><span class="lnt"> 8
</span><span class="lnt"> 9
</span><span class="lnt">10
</span><span class="lnt">11
</span><span class="lnt">12
</span><span class="lnt">13
</span><span class="lnt">14
</span><span class="lnt">15
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</span><span class="lnt">17
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-html" data-lang="html"><span class="line"><span class="cl"><span class="p"><</span><span class="nt">template</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"bg"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"user-list"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"user-card"</span> <span class="na">v-for</span><span class="o">=</span><span class="s">"items of user_list"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"user-image"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">img</span> <span class="na">:src</span><span class="o">=</span><span class="s">"items.avatar"</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"user-info"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">p</span> <span class="na">class</span><span class="o">=</span><span class="s">"user-name"</span><span class="p">></span>{{ items.name }}<span class="p"></</span><span class="nt">p</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">p</span> <span class="na">class</span><span class="o">=</span><span class="s">"description"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> A {{ items.user_type }}, {{ items.age }} years old.
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">p</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl"><span class="p"></</span><span class="nt">template</span><span class="p">></span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>Start the developerment server, you will see the page like this:</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ yarn dev
</span></span></code></pre></td></tr></table>
</div>
</div><p></p>
<p>Finally we just finish the CSS inside the <code><style scoped></code> tag to beautify the style.</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-css" data-lang="css"><span class="line"><span class="cl"><span class="p">@</span><span class="k">keyframes</span> <span class="nt">FadeIn</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">from</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="n">scale</span><span class="p">:</span> <span class="mf">0.75</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">opacity</span><span class="p">:</span> <span class="mi">0</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"> <span class="nt">to</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="n">scale</span><span class="p">:</span> <span class="mi">1</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">opacity</span><span class="p">:</span> <span class="mi">1</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">@</span><span class="k">keyframes</span> <span class="nt">BackgroundColor</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nt">from</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">background-color</span><span class="p">:</span> <span class="mh">#f1f1f1</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"> <span class="nt">to</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">background-color</span><span class="p">:</span> <span class="mh">#dfaed4</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">bg</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">width</span><span class="p">:</span> <span class="mi">100</span><span class="kt">vw</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">height</span><span class="p">:</span> <span class="mi">100</span><span class="kt">vh</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">display</span><span class="p">:</span> <span class="kc">flex</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">flex-direction</span><span class="p">:</span> <span class="kc">column</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">justify-content</span><span class="p">:</span> <span class="kc">center</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">align-items</span><span class="p">:</span> <span class="kc">center</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">background-color</span><span class="p">:</span> <span class="mh">#dfaed4</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">animation</span><span class="p">:</span> <span class="n">BackgroundColor</span> <span class="mi">5</span><span class="kt">s</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">user-list</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">width</span><span class="p">:</span> <span class="mi">450</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">height</span><span class="p">:</span> <span class="mi">800</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">overflow-y</span><span class="p">:</span> <span class="kc">scroll</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">overflow-x</span><span class="p">:</span> <span class="kc">hidden</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="n">scrollbar-width</span><span class="p">:</span> <span class="kc">none</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="n">scroll-behavior</span><span class="p">:</span> <span class="kc">smooth</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">display</span><span class="p">:</span> <span class="kc">flex</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">flex-direction</span><span class="p">:</span> <span class="kc">column</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">background-color</span><span class="p">:</span> <span class="mh">#ffffff</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">border-radius</span><span class="p">:</span> <span class="mi">20</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">animation</span><span class="p">:</span> <span class="n">FadeIn</span> <span class="mf">1.5</span><span class="kt">s</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">user-card</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">width</span><span class="p">:</span> <span class="mi">100</span><span class="kt">%</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">height</span><span class="p">:</span> <span class="kc">auto</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">display</span><span class="p">:</span> <span class="kc">flex</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">padding</span><span class="p">:</span> <span class="mi">20</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">flex-direction</span><span class="p">:</span> <span class="kc">row</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">border-bottom</span><span class="p">:</span> <span class="kc">solid</span> <span class="mi">1</span><span class="kt">px</span> <span class="mh">#ebebeb</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">user-image</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">width</span><span class="p">:</span> <span class="mi">120</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">height</span><span class="p">:</span> <span class="mi">120</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">border-radius</span><span class="p">:</span> <span class="mi">100</span><span class="kt">%</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">user-image</span> <span class="nt">img</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">width</span><span class="p">:</span> <span class="mi">100</span><span class="kt">%</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">height</span><span class="p">:</span> <span class="mi">100</span><span class="kt">%</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">border-radius</span><span class="p">:</span> <span class="mi">100</span><span class="kt">%</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">user-info</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">position</span><span class="p">:</span> <span class="kc">relative</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">left</span><span class="p">:</span> <span class="mi">40</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">display</span><span class="p">:</span> <span class="kc">flex</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">flex-direction</span><span class="p">:</span> <span class="kc">column</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">justify-content</span><span class="p">:</span> <span class="kc">flex-start</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">user-name</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">line-height</span><span class="p">:</span> <span class="mi">60</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">font-size</span><span class="p">:</span> <span class="mi">32</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="p">.</span><span class="nc">description</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="k">font-size</span><span class="p">:</span> <span class="mi">22</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">line-height</span><span class="p">:</span> <span class="mi">30</span><span class="kt">px</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span></code></pre></td></tr></table>
</div>
</div><p>You will see a elegant page with user list in your browser.</p>
<p></p>
<h1 id="conclusion">Conclusion</h1>
<p>In this project, we’ve successfully demonstrated the interaction between a frontend client made using Vue3 and a backend server powered by FastAPI. By establishing a connection where the client requests user data from the server, receives a JSON response, and renders it on the webpage, we’ve showcased a basic full-stack web application flow.</p>
<p>The backend server, built with FastAPI, functions as the intermediary between the data storage file (user_list.json) and the client. Upon receiving a request for user data at the endpoint <code>/userdata/list</code>, it reads the JSON data stored in memory, responds with the user list, and sends it back to the client for display.</p>
<p>The frontend, developed using Vue3, sends requests to the backend server using Axios, retrieves the user data, and dynamically updates the webpage to showcase user avatars, names, and descriptions. This seamless data flow between the client and server illustrates the principles of front-end and back-end separation in web development.</p>
<p>By combining technologies like Vue3, FastAPI, Python, and Axios, we’ve exemplified a simple yet effective approach to building web applications with modern tools and best practices in mind. This project serves as a foundation for creating more complex and feature-rich applications, highlighting the importance of efficient data fetching, processing, and rendering in web development.</p>
]]></description>
</item>
<item>
<title>Annual Summary in 2023</title>
<link>http://weepingdogel.github.io/posts/2023-annual-summary/</link>
<pubDate>Sun, 31 Dec 2023 21:43:24 +0800</pubDate>
<author>WeepingDogel</author>
<guid>http://weepingdogel.github.io/posts/2023-annual-summary/</guid>
<description><![CDATA[<div class="featured-image">
<img src="/img/github-worth.png" referrerpolicy="no-referrer">
</div><p>Though the time is a unit defined by people, it can still flow away like a river running from the hill to the plain. I Only feel a sigh and a wink, the 2023 just has passed.</p>
<p>Just looking back on the memories like the cherry blossoms drifting in midair, which I want to catch on my tiptoes, a lot has happened this year.</p>
<p>Now just hold the petals and look, which probably makes me bring back the time to mind.</p>
<h1 id="gained">Gained</h1>
<p>The past year has been a whirlwind of learning and growth for me.</p>
<h2 id="skills--knowledge">Skills & Knowledge</h2>
<p>In 2023, I delved into a multitude of skills and embarked on several captivating open-source projects that have significantly broadened my horizons.</p>
<h3 id="flask">Flask</h3>
<p>Let’s start with the Flask journey.</p>
<p>Early on, I found myself entangled in the enchanting web of Flask, a delightful web application framework in Python.
The thrill of setting up and completing the <a href="https://github.com/WeepingDogel/tinygallery" target="_blank" rel="noopener noreffer ">TinyGallery</a> using Flask’s straightforward and efficient MVC structure left an indelible mark on my learning path.</p>
<p>Diving into the official Flask documentation, I uncovered the art of rendering pages with the aid of jinja2-powered templates. This exploration, though it demanded patience, eventually bore fruit as I gradually incorporated functionalities into the project—minus the requirement of file uploads.</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="nd">@app.route</span><span class="p">(</span><span class="s2">"/"</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="k">def</span> <span class="nf">index</span><span class="p">():</span>
</span></span><span class="line"><span class="cl"> <span class="n">database</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">get_db</span><span class="p">()</span>
</span></span><span class="line"><span class="cl"> <span class="n">ImageTable</span> <span class="o">=</span> <span class="n">database</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"SELECT * FROM IMAGES ORDER BY Date DESC"</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"> <span class="k">if</span> <span class="s1">'username'</span> <span class="ow">in</span> <span class="n">session</span><span class="p">:</span>
</span></span><span class="line"><span class="cl"> <span class="n">LikeTable</span> <span class="o">=</span> <span class="n">database</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"SELECT LikedPostUUID FROM ImagesLikedByUser WHERE User = ? AND LikeStatus = ?"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="p">(</span><span class="n">session</span><span class="p">[</span><span class="s1">'username'</span><span class="p">],</span> <span class="mi">1</span><span class="p">,</span> <span class="p">))</span><span class="o">.</span><span class="n">fetchall</span><span class="p">()</span>
</span></span><span class="line"><span class="cl"> <span class="n">LikedList</span> <span class="o">=</span> <span class="p">[]</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">LikeTable</span><span class="p">:</span>
</span></span><span class="line"><span class="cl"> <span class="n">LikedList</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">i</span><span class="p">[</span><span class="mi">0</span><span class="p">]))</span>
</span></span><span class="line"><span class="cl"> <span class="n">Avatar</span> <span class="o">=</span> <span class="n">database</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'SELECT Avatar FROM AVATARS WHERE UserName = ?'</span><span class="p">,</span> <span class="p">(</span><span class="n">session</span><span class="p">[</span><span class="s1">'username'</span><span class="p">],))</span><span class="o">.</span><span class="n">fetchone</span><span class="p">()</span>
</span></span><span class="line"><span class="cl"> <span class="n">userAvaterImage</span> <span class="o">=</span> <span class="n">app</span><span class="o">.</span><span class="n">config</span><span class="p">[</span><span class="s1">'PUBLIC_USERFILES'</span><span class="p">]</span> <span class="o">+</span> <span class="s1">'/'</span> <span class="o">+</span> <span class="n">session</span><span class="p">[</span><span class="s1">'username'</span><span class="p">]</span> <span class="o">+</span> <span class="s1">'/'</span> <span class="o">+</span> <span class="n">Avatar</span><span class="p">[</span><span class="s1">'Avatar'</span><span class="p">]</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="n">render_template</span><span class="p">(</span>
</span></span><span class="line"><span class="cl"> <span class="s2">"index.html"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="n">PageTitle</span><span class="o">=</span><span class="s2">"HomePage"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="n">Images</span><span class="o">=</span><span class="n">ImageTable</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="n">userAvaterImage</span><span class="o">=</span><span class="n">userAvaterImage</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="n">userName</span><span class="o">=</span><span class="n">session</span><span class="p">[</span><span class="s1">'username'</span><span class="p">],</span>
</span></span><span class="line"><span class="cl"> <span class="n">LikedList</span><span class="o">=</span><span class="n">LikedList</span><span class="p">)</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"> <span class="k">else</span><span class="p">:</span>
</span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="n">render_template</span><span class="p">(</span><span class="s2">"index.html"</span><span class="p">,</span> <span class="n">PageTitle</span><span class="o">=</span><span class="s2">"HomePage"</span><span class="p">,</span> <span class="n">Images</span><span class="o">=</span><span class="n">ImageTable</span><span class="p">)</span>
</span></span></code></pre></td></tr></table>
</div>
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<pre tabindex="0" class="chroma"><code class="language-html" data-lang="html"><span class="line"><span class="cl">{% extends "base.html" %}
</span></span><span class="line"><span class="cl">{% block Title %} {{PageTitle}} | TinyGallery {% endblock %}
</span></span><span class="line"><span class="cl">{% block body %}
</span></span><span class="line"><span class="cl"><span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"Content"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> {% for x in Images %}
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"work"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">img</span> <span class="na">class</span><span class="o">=</span><span class="s">"displayedImages"</span> <span class="na">onclick</span><span class="o">=</span><span class="s">"OpenFullImage({{ loop["</span> <span class="na">index</span><span class="err">"]</span> <span class="err">}})"</span>
</span></span><span class="line"><span class="cl"> <span class="na">src</span><span class="o">=</span><span class="s">"/static/img/users/{{ x['User'] }}/Images/{{ x['UUID'] }}.jpg"</span> <span class="na">alt</span><span class="o">=</span><span class="s">"{{ x['UUID'] }}"</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">h1</span> <span class="na">class</span><span class="o">=</span><span class="s">"userName"</span><span class="p">></span>{{ x['ImageTitle'] }}<span class="p"></</span><span class="nt">h1</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">p</span> <span class="na">class</span><span class="o">=</span><span class="s">"textFont"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">span</span><span class="p">></span>By {{ x['User'] }}<span class="p"></</span><span class="nt">span</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">br</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">span</span> <span class="na">class</span><span class="o">=</span><span class="s">"LikesNum"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> Likes: {{ x['Dots'] }}
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">span</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">br</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">span</span><span class="p">></span>Description: {{ x['Description'] }}<span class="p"></</span><span class="nt">span</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">br</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">span</span><span class="p">></span>Date: {{x['Date']}}<span class="p"></</span><span class="nt">span</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">br</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> {% if g.user %}
</span></span><span class="line"><span class="cl"> {% if x['UUID'] in LikedList %}
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">svg</span> <span class="na">onclick</span><span class="o">=</span><span class="s">"SendLikedData({{ loop["</span> <span class="na">index</span><span class="err">"]</span> <span class="err">}},</span> <span class="err">'</span><span class="na">Like</span><span class="err">'</span> <span class="err">)"</span> <span class="na">class</span><span class="o">=</span><span class="s">"likeStatus0"</span> <span class="na">style</span><span class="o">=</span><span class="s">"display: none;"</span>
</span></span><span class="line"><span class="cl"> <span class="na">xmlns</span><span class="o">=</span><span class="s">"http://www.w3.org/2000/svg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"16"</span> <span class="na">height</span><span class="o">=</span><span class="s">"16"</span> <span class="na">fill</span><span class="o">=</span><span class="s">"currentColor"</span> <span class="na">class</span><span class="o">=</span><span class="s">"bi bi-star"</span>
</span></span><span class="line"><span class="cl"> <span class="na">viewBox</span><span class="o">=</span><span class="s">"0 0 16 16"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">path</span>
</span></span><span class="line"><span class="cl"> <span class="na">d</span><span class="o">=</span><span class="s">"M2.866 14.85c-.078.444.36.791.746.593l4.39-2.256 4.389 2.256c.386.198.824-.149.746-.592l-.83-4.73 3.522-3.356c.33-.314.16-.888-.282-.95l-4.898-.696L8.465.792a.513.513 0 0 0-.927 0L5.354 5.12l-4.898.696c-.441.062-.612.636-.283.95l3.523 3.356-.83 4.73zm4.905-2.767-3.686 1.894.694-3.957a.565.565 0 0 0-.163-.505L1.71 6.745l4.052-.576a.525.525 0 0 0 .393-.288L8 2.223l1.847 3.658a.525.525 0 0 0 .393.288l4.052.575-2.906 2.77a.565.565 0 0 0-.163.506l.694 3.957-3.686-1.894a.503.503 0 0 0-.461 0z"</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">svg</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">svg</span> <span class="na">onclick</span><span class="o">=</span><span class="s">"SendLikedData({{ loop["</span> <span class="na">index</span><span class="err">"]</span> <span class="err">}},</span> <span class="err">'</span><span class="na">Unlike</span><span class="err">'</span> <span class="err">)"</span> <span class="na">class</span><span class="o">=</span><span class="s">"likeStatus1"</span>
</span></span><span class="line"><span class="cl"> <span class="na">xmlns</span><span class="o">=</span><span class="s">"http://www.w3.org/2000/svg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"16"</span> <span class="na">height</span><span class="o">=</span><span class="s">"16"</span> <span class="na">fill</span><span class="o">=</span><span class="s">"currentColor"</span> <span class="na">class</span><span class="o">=</span><span class="s">"bi bi-star-fill"</span>
</span></span><span class="line"><span class="cl"> <span class="na">viewBox</span><span class="o">=</span><span class="s">"0 0 16 16"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">path</span>
</span></span><span class="line"><span class="cl"> <span class="na">d</span><span class="o">=</span><span class="s">"M3.612 15.443c-.386.198-.824-.149-.746-.592l.83-4.73L.173 6.765c-.329-.314-.158-.888.283-.95l4.898-.696L7.538.792c.197-.39.73-.39.927 0l2.184 4.327 4.898.696c.441.062.612.636.282.95l-3.522 3.356.83 4.73c.078.443-.36.79-.746.592L8 13.187l-4.389 2.256z"</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">svg</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> {% else %}
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">svg</span> <span class="na">onclick</span><span class="o">=</span><span class="s">"SendLikedData({{ loop["</span> <span class="na">index</span><span class="err">"]</span> <span class="err">}},</span> <span class="err">'</span><span class="na">Like</span><span class="err">'</span> <span class="err">)"</span> <span class="na">class</span><span class="o">=</span><span class="s">"likeStatus0"</span>
</span></span><span class="line"><span class="cl"> <span class="na">xmlns</span><span class="o">=</span><span class="s">"http://www.w3.org/2000/svg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"16"</span> <span class="na">height</span><span class="o">=</span><span class="s">"16"</span> <span class="na">fill</span><span class="o">=</span><span class="s">"currentColor"</span> <span class="na">class</span><span class="o">=</span><span class="s">"bi bi-star"</span>
</span></span><span class="line"><span class="cl"> <span class="na">viewBox</span><span class="o">=</span><span class="s">"0 0 16 16"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">path</span>
</span></span><span class="line"><span class="cl"> <span class="na">d</span><span class="o">=</span><span class="s">"M2.866 14.85c-.078.444.36.791.746.593l4.39-2.256 4.389 2.256c.386.198.824-.149.746-.592l-.83-4.73 3.522-3.356c.33-.314.16-.888-.282-.95l-4.898-.696L8.465.792a.513.513 0 0 0-.927 0L5.354 5.12l-4.898.696c-.441.062-.612.636-.283.95l3.523 3.356-.83 4.73zm4.905-2.767-3.686 1.894.694-3.957a.565.565 0 0 0-.163-.505L1.71 6.745l4.052-.576a.525.525 0 0 0 .393-.288L8 2.223l1.847 3.658a.525.525 0 0 0 .393.288l4.052.575-2.906 2.77a.565.565 0 0 0-.163.506l.694 3.957-3.686-1.894a.503.503 0 0 0-.461 0z"</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">svg</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">svg</span> <span class="na">onclick</span><span class="o">=</span><span class="s">"SendLikedData({{ loop["</span> <span class="na">index</span><span class="err">"]</span> <span class="err">}},</span> <span class="err">'</span><span class="na">Unlike</span><span class="err">'</span> <span class="err">)"</span> <span class="na">class</span><span class="o">=</span><span class="s">"likeStatus1"</span> <span class="na">style</span><span class="o">=</span><span class="s">"display: none;"</span>
</span></span><span class="line"><span class="cl"> <span class="na">xmlns</span><span class="o">=</span><span class="s">"http://www.w3.org/2000/svg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"16"</span> <span class="na">height</span><span class="o">=</span><span class="s">"16"</span> <span class="na">fill</span><span class="o">=</span><span class="s">"currentColor"</span> <span class="na">class</span><span class="o">=</span><span class="s">"bi bi-star-fill"</span>
</span></span><span class="line"><span class="cl"> <span class="na">viewBox</span><span class="o">=</span><span class="s">"0 0 16 16"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">path</span>
</span></span><span class="line"><span class="cl"> <span class="na">d</span><span class="o">=</span><span class="s">"M3.612 15.443c-.386.198-.824-.149-.746-.592l.83-4.73L.173 6.765c-.329-.314-.158-.888.283-.95l4.898-.696L7.538.792c.197-.39.73-.39.927 0l2.184 4.327 4.898.696c.441.062.612.636.282.95l-3.522 3.356.83 4.73c.078.443-.36.79-.746.592L8 13.187l-4.389 2.256z"</span> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">svg</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> {% endif %}
</span></span><span class="line"><span class="cl"> {% endif %}
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">p</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> {% endfor %}
</span></span><span class="line"><span class="cl"><span class="p"></</span><span class="nt">div</span><span class="p">></span>
</span></span><span class="line"><span class="cl">{% endblock %}
</span></span></code></pre></td></tr></table>
</div>
</div><p>Despite its simplicity and ease of adoption, Flask did exhibit some flaws and yielded challenging bugs in the earlier versions of TinyGallery, contributing to a decision to transition to a new technology stack.</p>
<h3 id="fastapi-vuejs">FastAPI, VueJS</h3>
<p>Enter <strong>FastAPI</strong> and <strong>VueJS</strong>. To elevate the TinyGallery experience, a decision was made to bifurcate the backend and frontend, with a keen emphasis on leveraging Ajax-all-in and Restful API features. This compelling pursuit led me to immerse myself in the world of VueJS, resulting in the creation of <a href="https://github.com/WeepingDogel/tinygallery-vue" target="_blank" rel="noopener noreffer ">tinygallery-vue</a> and <a href="https://github.com/WeepingDogel/tinygallery-backend" target="_blank" rel="noopener noreffer ">tinygallery-backend</a>. Months of dedicated learning culminated in the successful completion of this endeavor.</p>
<p>The depth and breadth of my learning during this period were substantial, encompassing the creation of a Restful API provider with FastAPI, the crafting of a webpage capable of seamless data communication with the server using axios, and the meticulous design of simple, yet elegant components in VueJS.</p>
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<pre tabindex="0" class="chroma"><code class="language-typescript" data-lang="typescript"><span class="line"><span class="cl"><span class="kr">async</span> <span class="nx">fetchData() {</span>
</span></span><span class="line"><span class="cl"> <span class="c1">// Fetch more image data from the server
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="k">this</span><span class="p">.</span><span class="nx">pages</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">pages</span> <span class="o">+</span> <span class="mi">1</span><span class="p">;</span> <span class="c1">// Increment the current page number
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="kr">const</span> <span class="nx">response</span> <span class="o">=</span> <span class="k">await</span> <span class="nx">axios</span><span class="p">.</span><span class="kr">get</span><span class="p">(</span><span class="s2">"/resources/posts/"</span> <span class="o">+</span> <span class="k">this</span><span class="p">.</span><span class="nx">pages</span><span class="p">);</span> <span class="c1">// Make a GET request to the server API
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="kr">const</span> <span class="nx">newData</span> <span class="o">=</span> <span class="nx">JSON</span><span class="p">.</span><span class="nx">parse</span><span class="p">(</span><span class="nx">response</span><span class="p">.</span><span class="nx">request</span><span class="p">.</span><span class="nx">response</span><span class="p">);</span> <span class="c1">// Parse the response text to JSON format
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="k">if</span> <span class="p">(</span><span class="nx">newData</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="kc">null</span><span class="p">)</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="c1">// If there is no new data
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="k">this</span><span class="p">.</span><span class="nx">pages</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">pages</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span> <span class="c1">// Decrement the current page number
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="c1">// Otherwise
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="k">for</span> <span class="p">(</span><span class="kd">let</span> <span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><</span> <span class="nx">newData</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span> <span class="nx">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="c1">// Loop over the new data and add it to the display data array
</span></span></span><span class="line"><span class="cl"><span class="c1"></span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">displayData</span> <span class="kr">as</span> <span class="kt">any</span><span class="p">).</span><span class="nx">push</span><span class="p">(</span><span class="nx">newData</span><span class="p">[</span><span class="nx">i</span><span class="p">]);</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">},</span>
</span></span></code></pre></td></tr></table>
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-html" data-lang="html"><span class="line"><span class="cl"><span class="p"><</span><span class="nt">template</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"Card"</span> <span class="na">v-for</span><span class="o">=</span><span class="s">"items of displayData"</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">img</span>
</span></span><span class="line"><span class="cl"> <span class="err">@</span><span class="na">click</span><span class="o">=</span><span class="s">"OpenRemarkBySingleUUID((items as any).post_uuid)"</span>
</span></span><span class="line"><span class="cl"> <span class="na">class</span><span class="o">=</span><span class="s">"displayImage_NSFW"</span>
</span></span><span class="line"><span class="cl"> <span class="na">:src</span><span class="o">=</span><span class="s">"(items as any).cover_url"</span>
</span></span><span class="line"><span class="cl"> <span class="na">:alt</span><span class="o">=</span><span class="s">"(items as any).post_uuid"</span>
</span></span><span class="line"><span class="cl"> <span class="na">v-if</span><span class="o">=</span><span class="s">"(items as any).nsfw"</span>
</span></span><span class="line"><span class="cl"> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">img</span>
</span></span><span class="line"><span class="cl"> <span class="err">@</span><span class="na">click</span><span class="o">=</span><span class="s">"OpenRemarkBySingleUUID((items as any).post_uuid)"</span>
</span></span><span class="line"><span class="cl"> <span class="na">class</span><span class="o">=</span><span class="s">"displayImage"</span>
</span></span><span class="line"><span class="cl"> <span class="na">:src</span><span class="o">=</span><span class="s">"(items as any).cover_url"</span>
</span></span><span class="line"><span class="cl"> <span class="na">:alt</span><span class="o">=</span><span class="s">"(items as any).post_uuid"</span>
</span></span><span class="line"><span class="cl"> <span class="na">v-else</span>
</span></span><span class="line"><span class="cl"> <span class="p">/></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">h2</span> <span class="na">class</span><span class="o">=</span><span class="s">"ImageTitle"</span><span class="p">></span>{{ (items as any).post_title }}<span class="p"></</span><span class="nt">h2</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">p</span> <span class="na">class</span><span class="o">=</span><span class="s">"ImageDescription"</span><span class="p">></span>{{ (items as any).description }}<span class="p"></</span><span class="nt">p</span><span class="p">></span>
</span></span><span class="line"><span class="cl"> <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"UserInfoBar"</span><span class="p">></span>