1 files changed, 123 insertions, 0 deletions
diff --git a/w3c-validator.py b/w3c-validator.py
new file mode 100644
index 0000000..b3953fb
--- /dev/null
+++ b/w3c-validator.py
@@ -0,0 +1,123 @@
+#!/usr/bin/env python
+'''
+w3c-validator - Validate HTML and CSS files using the WC3 validators
+'''
+
+import os
+import sys
+import time
+import json
+import subprocess
+
+html_validator_url = 'https://validator.w3.org/check'
+css_validator_url = 'https://jigsaw.w3.org/css-validator/validator'
+
+verbose_option = False
+
+
+def message(msg):
+    print(msg, file=sys.stderr)
+
+
+def verbose(msg):
+    if verbose_option:
+        message(msg)
+
+
+def validate(filename):
+    '''
+    Validate file and return JSON result as dictionary.
+    'filename' can be a file name or an HTTP URL.
+    Return '' if the validator does not return valid JSON.
+    Raise OSError if curl command returns an error status.
+    '''
+    quoted_filename = filename
+    if filename.startswith('https://'):
+        # Submit URI with GET.
+        if filename.endswith('.css'):
+            cmd = ('curl -sG -d uri=%s -d output=json -d warning=0 %s'
+                   % (quoted_filename, css_validator_url))
+        else:
+            cmd = ('curl -sG -d uri=%s -d output=json %s'
+                   % (quoted_filename, html_validator_url))
+    else:
+        # Upload file as multipart/form-data with POST.
+        if filename.endswith('.css'):
+            cmd = ('curl -sF "file=@%s;type=text/css" -F output=json -F warning=0 %s'
+                   % (quoted_filename, css_validator_url))
+        else:
+            cmd = ('curl -sF "uploaded_file=@%s;type=text/html" -F output=json %s'
+                   % (quoted_filename, html_validator_url))
+    verbose(cmd)
+    status, output = subprocess.getstatusoutput(cmd)
+    if status != 0:
+        raise OSError(status, 'failed: %s' % cmd)
+    verbose(output)
+    try:
+        result = json.loads(output)
+    except ValueError:
+        result = ''
+    time.sleep(2)  # Be nice and don't hog the free validator service
+    return result
+
+
+if __name__ == '__main__':
+    if len(sys.argv) >= 2 and sys.argv[1] == '--verbose':
+        verbose_option = True
+        args = sys.argv[2:]
+    else:
+        args = sys.argv[1:]
+    if len(args) == 0:
+        message('usage: %s [--verbose] FILE|URL...' %
+                os.path.basename(sys.argv[0]))
+        exit(1)
+    errors = 0
+    warnings = 0
+    for f in args:
+        message('validating: %s ...' % f)
+        retrys = 0
+        while retrys < 2:
+            result = validate(f)
+            if result:
+                break
+            retrys += 1
+            message('retrying: %s ...' % f)
+        else:
+            message('failed: %s' % f)
+            errors += 1
+            continue
+        if f.endswith('.css'):
+            errorcount = result['cssvalidation']['result']['errorcount']
+            warningcount = result['cssvalidation']['result']['warningcount']
+            errors += errorcount
+            warnings += warningcount
+            if errorcount > 0:
+                message('errors: %d' % errorcount)
+            if warningcount > 0:
+                message('warnings: %d' % warningcount)
+            # Output CSS warnings messages
+            if 'warnings' in result['cssvalidation']:
+                for msg in result['cssvalidation']['warnings']:
+                    if 'line' in msg:
+                        message('%(type)s: line %(line)d: %(message)s' % msg)
+                    else:
+                        message('%(type)s: %(message)s' % msg)
+            # Output CSS error messages
+            if 'errors' in result['cssvalidation']:
+                for msg in result['cssvalidation']['errors']:
+                    if 'line' in msg:
+                        message('%(type)s: line %(line)d: %(message)s' % msg)
+                    else:
+                        message('%(type)s: %(message)s' % msg)
+        else:
+            for msg in result['messages']:
+                if 'lastLine' in msg:
+                    message('%(type)s: line %(lastLine)d: %(message)s' % msg)
+                else:
+                    message('%(type)s: %(message)s' % msg)
+                if msg['type'] == 'error':
+                    errors += 1
+                else:
+                    warnings += 1
+    if errors:
+        exit(1)