Fix for SSL ceritficate verification failure on Travis CI

Report exception when failed downloading files during install

Author: danielhers

ci/test.sh

@@ -13,12 +13,12 @@ if ! [[ "$ACTION" =~ ^(toy|unit)$ ]]; then
     case "$FORMAT" in
     ucca)
         mkdir pickle
-        curl -L https://github.com/UniversalConceptualCognitiveAnnotation/UCCA_English-Wiki/releases/download/v1.2.4/ucca-sample.tar.gz | tar xz -C pickle
+        curl -L --insecure https://github.com/UniversalConceptualCognitiveAnnotation/UCCA_English-Wiki/releases/download/v1.2.4/ucca-sample.tar.gz | tar xz -C pickle
         TRAIN_DATA="pickle/train/*"
         DEV_DATA="pickle/dev/*"
         ;;
     amr)
-        curl --remote-name-all https://amr.isi.edu/download/2016-03-14/alignment-release-{training,dev,test}-bio.txt
+        curl --insecure --remote-name-all https://amr.isi.edu/download/2016-03-14/alignment-release-{training,dev,test}-bio.txt
         rename 's/.txt/.amr/' alignment-release-*-bio.txt
         python -m semstr.scripts.split -q alignment-release-training-bio.amr -o alignment-release-training-bio
         CONVERT_DATA=alignment-release-dev-bio.amr
@@ -27,7 +27,7 @@ if ! [[ "$ACTION" =~ ^(toy|unit)$ ]]; then
         ;;
     sdp)
         mkdir data
-        curl -L http://svn.delph-in.net/sdp/public/2015/trial/current.tgz | tar xz -C data
+        curl -L --insecure http://svn.delph-in.net/sdp/public/2015/trial/current.tgz | tar xz -C data
         python -m semstr.scripts.split -q data/sdp/trial/dm.sdp -o data/sdp/trial/dm
         python -m scripts.split_corpus -q data/sdp/trial/dm -t 120 -d 36 -l
         CONVERT_DATA=data/sdp/trial/*.sdp

setup.py

@@ -55,10 +55,14 @@ def run(self):
             out_file = os.path.join("semstr", "util", "resources", filename)
             if not os.path.exists(out_file):
                 self.announce("Getting '%s'..." % filename)
-                try:
-                    urllib.request.urlretrieve("https://amr.isi.edu/download/lists/" + filename, out_file)
-                except:
-                    self.warn("Failed downloading https://amr.isi.edu/download/lists/" + filename + " to " + out_file)
+                for attempt in 1, 2:
+                    try:
+                        urllib.request.urlretrieve("https://amr.isi.edu/download/lists/" + filename, out_file)
+                    except Exception as e:
+                        self.warn("Failed downloading https://amr.isi.edu/download/lists/" + filename + " to " + out_file + ": " + str(e))
+                        import ssl
+                        if getattr(ssl, '_create_unverified_context', None):
+                            ssl._create_default_https_context = ssl._create_unverified_context
 
         # Install actual package
         _install.run(self)