travis: Test SSL using ssl-check.py script copied from manylinux

See https://github.com/pypa/manylinux/blob/master/docker/build_scripts/ssl-check.py

Author: jcfr

.travis.yml

@@ -26,6 +26,7 @@ cache:
 
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then mkdir $HOME/bin; ln -s $(which pip2) $HOME/bin/pip; ln -s $(which python2) $HOME/bin/python; fi
+  - python scripts/ssl-check.py
   - python -m pip install --disable-pip-version-check --upgrade pip
   - pip install -U scikit-ci scikit-ci-addons
   - ci_addons --install ../addons

scripts/ssl-check.py

@@ -0,0 +1,32 @@
+# cf. https://github.com/pypa/manylinux/issues/53
+
+GOOD_SSL = "https://google.com"
+BAD_SSL = "https://self-signed.badssl.com"
+
+import sys
+
+print("Testing SSL certificate checking for Python:", sys.version)
+
+if (sys.version_info[:2] < (3, 4)):
+    print("This version never checks SSL certs; skipping tests")
+    sys.exit(0)
+
+if sys.version_info[0] >= 3:
+    from urllib.request import urlopen
+    EXC = OSError
+else:
+    from urllib import urlopen
+    EXC = IOError
+
+print("Connecting to %s should work" % (GOOD_SSL,))
+urlopen(GOOD_SSL)
+print("...it did, yay.")
+
+print("Connecting to %s should fail" % (BAD_SSL,))
+try:
+    urlopen(BAD_SSL)
+    # If we get here then we failed:
+    print("...it DIDN'T!!!!!11!!1one!")
+    sys.exit(1)
+except EXC:
+    print("...it did, yay.")