Python Go Binary sample

README.md

@@ -170,6 +170,8 @@ is demonstrating.
   This example shows how to create NodeJS functions with can perfome a http request without additional modules
 - [function-http-python](helloworld-samples/function-http-python)
   This example shows how to create Python functions which can perfome a http request without additional modules
+- [function-python-go-binary](helloworld-samples/function-python-go-binary/README.md)
+  This example shows how to create a Python function which includes and executes a Go binary
 
 #### Eventing
 - [cron](cron)<br>

helloworld-samples/function-python-go-binary/.ceignore

@@ -0,0 +1 @@
+main.go

helloworld-samples/function-python-go-binary/README.md

@@ -0,0 +1,17 @@
+# Python Function with an additional Go binary
+
+A sample Python function which lets you add an additional go binary and call it as part of the function call.
+
+Build the go binary:
+
+```bash
+GOOS=linux GOARCH=amd64 go build -o "my-program" -ldflags="-s -w" ./main.go
+```
+
+Deploy the function straight to Code Engine by running the following command from this directory
+
+```bash
+ibmcloud ce fn create -n py-go-func -runtime python-3.11 --build-source .
+```
+
+For more information follow blog -> [IBM Cloud Code Engine: Running Binaries inside the IBM Cloud Code Engine Function Runtimes](https://medium.com/@luke.roy/ibm-cloud-code-engine-running-binarys-inside-the-ibm-cloud-code-engine-function-runtimes-6216e34cad54)

helloworld-samples/function-python-go-binary/__main__.py

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+import subprocess
+import json
+
+output_dict={}
+statusCode = 0
+binary="my-program"
+
+def main(params):
+    command = f'./{binary} \'{json.dumps(params)}\''
+    result = subprocess.run(command, shell=True, capture_output=True, text=True)
+
+    if result.returncode == 0:
+        statusCode = 200
+        output_dict = json.loads(result.stdout)
+    else:
+        statusCode = 500
+        output_dict = {"error":"an error as occured"}
+
+    return {
+        "headers": {
+            'Content-Type': 'application/json; charset=utf-8',
+        },
+        "statusCode": statusCode,
+        "body": output_dict,
+    }

helloworld-samples/function-python-go-binary/main.go

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+package main
+
+import (
+    "encoding/json"
+    "fmt"
+    "os"
+)
+
+type Response struct {
+    Key   string      `json:"key"`
+    Value string      `json:"value"`
+    Data  interface{} `json:"data"`
+}
+
+func main() {
+    // recive data as json string and unmarshal into variable
+    var inputData map[string]interface{}
+    if len(os.Args) > 1 {
+        jsonString := os.Args[1]
+        err := json.Unmarshal([]byte(jsonString), &inputData)
+        if err != nil {
+            os.Exit(1)
+        }
+    }
+
+    // Here comes your logic
+    name := "placeholder"
+    if len(inputData) != 0 {
+        name = inputData["name"].(string)
+    }
+
+    // return the response json (to the python code)
+    respones := Response{
+        Key:   "New Key",
+        Value: name,
+        Data:  inputData,
+    }
+    responseJSON, err := json.Marshal(respones)
+    if err != nil {
+        os.Exit(1)
+    }
+    fmt.Println(string(responseJSON))
+}

helloworld-samples/function-python-go-binary/requirements.txt

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+# add any additiona python modules you might need