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| 1 | +#!/usr/bin/env python3 |
| 2 | +# -*- coding: utf-8 -*- |
| 3 | +""" |
| 4 | +Tests for GitHub camo URL length limits. |
| 5 | +
|
| 6 | +When badges are used in GitHub markdown files, GitHub proxies the image URLs through |
| 7 | +camo.githubusercontent.com for security. The camo proxy hex-encodes the original URL, |
| 8 | +resulting in: https://camo.githubusercontent.com/<40-char-digest>/<hex-encoded-url> |
| 9 | +
|
| 10 | +This approximately doubles the URL length plus 76 chars overhead. The camo service has |
| 11 | +an 8192 character limit, so badge URLs must stay under ~4058 chars to work correctly. |
| 12 | +""" |
| 13 | + |
| 14 | +import argparse |
| 15 | +import tempfile |
| 16 | +import os |
| 17 | +from badgesort.icons import run, svg_to_base64_data_uri |
| 18 | +from simpleicons.all import icons |
| 19 | +from urllib.parse import quote |
| 20 | + |
| 21 | + |
| 22 | +CAMO_URL_LIMIT = 8192 |
| 23 | +CAMO_OVERHEAD = 76 # base URL (35) + digest (40) + slash (1) |
| 24 | + |
| 25 | + |
| 26 | +def calculate_camo_url_length(badge_url): |
| 27 | + """Calculate the approximate camo URL length for a badge URL. |
| 28 | + |
| 29 | + GitHub's camo proxy format: https://camo.githubusercontent.com/<digest>/<hex-encoded-url> |
| 30 | + """ |
| 31 | + return CAMO_OVERHEAD + (len(badge_url.encode('utf-8')) * 2) |
| 32 | + |
| 33 | + |
| 34 | +def test_svg_data_uri_max_length_default(): |
| 35 | + """Test that default max_url_length respects camo limits.""" |
| 36 | + # The default max_url_length should be 3700 to stay under camo's 8192 limit |
| 37 | + # This test verifies the function signature has the correct default |
| 38 | + import inspect |
| 39 | + sig = inspect.signature(svg_to_base64_data_uri) |
| 40 | + max_url_length_default = sig.parameters['max_url_length'].default |
| 41 | + |
| 42 | + assert max_url_length_default == 3700, \ |
| 43 | + f"Default max_url_length should be 3700 (found {max_url_length_default})" |
| 44 | + |
| 45 | + |
| 46 | +def test_shields_embedded_svg_urls_under_camo_limit(): |
| 47 | + """Test that Shields.io badges with embedded SVGs stay under camo URL limit.""" |
| 48 | + with tempfile.NamedTemporaryFile(mode='w', suffix='.md', delete=False) as f: |
| 49 | + f.write("""# Test File |
| 50 | +
|
| 51 | +<!-- start chipwolf/badgesort test --> |
| 52 | +<!-- end chipwolf/badgesort test --> |
| 53 | +""") |
| 54 | + temp_file = f.name |
| 55 | + |
| 56 | + try: |
| 57 | + # Test with a few complex icons that have large SVGs |
| 58 | + test_slugs = ['github', 'python', 'docker', 'kubernetes', 'amazonaws'] |
| 59 | + |
| 60 | + args = argparse.Namespace( |
| 61 | + slugs=test_slugs, |
| 62 | + random=1, |
| 63 | + output=temp_file, |
| 64 | + id='test', |
| 65 | + format='markdown', |
| 66 | + badge_style='for-the-badge', |
| 67 | + color_sort='hilbert', |
| 68 | + hue_rotate=0, |
| 69 | + no_thanks=True, |
| 70 | + reverse=False, |
| 71 | + provider='shields', |
| 72 | + verify=False, |
| 73 | + embed_svg=True, # Force SVG embedding to test worst case |
| 74 | + skip_logo_check=True |
| 75 | + ) |
| 76 | + |
| 77 | + run(args) |
| 78 | + |
| 79 | + with open(temp_file, 'r') as f: |
| 80 | + result = f.read() |
| 81 | + |
| 82 | + # Extract badge URLs and check their camo lengths |
| 83 | + import re |
| 84 | + badge_urls = re.findall(r'https://img\.shields\.io/[^\)]+', result) |
| 85 | + |
| 86 | + for url in badge_urls: |
| 87 | + camo_length = calculate_camo_url_length(url) |
| 88 | + assert camo_length <= CAMO_URL_LIMIT, \ |
| 89 | + f"Badge URL would exceed camo limit: {camo_length} > {CAMO_URL_LIMIT}\nURL: {url[:100]}..." |
| 90 | + |
| 91 | + print(f"✓ All {len(badge_urls)} badge URLs stay under {CAMO_URL_LIMIT} char camo limit") |
| 92 | + |
| 93 | + finally: |
| 94 | + os.unlink(temp_file) |
| 95 | + |
| 96 | + |
| 97 | +def test_badgen_urls_under_camo_limit(): |
| 98 | + """Test that Badgen.net badge URLs stay under camo URL limit.""" |
| 99 | + with tempfile.NamedTemporaryFile(mode='w', suffix='.md', delete=False) as f: |
| 100 | + f.write("""# Test File |
| 101 | +
|
| 102 | +<!-- start chipwolf/badgesort test --> |
| 103 | +<!-- end chipwolf/badgesort test --> |
| 104 | +""") |
| 105 | + temp_file = f.name |
| 106 | + |
| 107 | + try: |
| 108 | + # Test with a few icons |
| 109 | + test_slugs = ['github', 'python', 'docker'] |
| 110 | + |
| 111 | + args = argparse.Namespace( |
| 112 | + slugs=test_slugs, |
| 113 | + random=1, |
| 114 | + output=temp_file, |
| 115 | + id='test', |
| 116 | + format='markdown', |
| 117 | + badge_style='flat', |
| 118 | + color_sort='hilbert', |
| 119 | + hue_rotate=0, |
| 120 | + no_thanks=True, |
| 121 | + reverse=False, |
| 122 | + provider='badgen', # Badgen always embeds SVG |
| 123 | + verify=False, |
| 124 | + embed_svg=False, |
| 125 | + skip_logo_check=True |
| 126 | + ) |
| 127 | + |
| 128 | + run(args) |
| 129 | + |
| 130 | + with open(temp_file, 'r') as f: |
| 131 | + result = f.read() |
| 132 | + |
| 133 | + # Extract badge URLs and check their camo lengths |
| 134 | + import re |
| 135 | + badge_urls = re.findall(r'https://badgen\.net/[^\)]+', result) |
| 136 | + |
| 137 | + for url in badge_urls: |
| 138 | + camo_length = calculate_camo_url_length(url) |
| 139 | + assert camo_length <= CAMO_URL_LIMIT, \ |
| 140 | + f"Badgen URL would exceed camo limit: {camo_length} > {CAMO_URL_LIMIT}\nURL: {url[:100]}..." |
| 141 | + |
| 142 | + print(f"✓ All {len(badge_urls)} Badgen URLs stay under {CAMO_URL_LIMIT} char camo limit") |
| 143 | + |
| 144 | + finally: |
| 145 | + os.unlink(temp_file) |
| 146 | + |
| 147 | + |
| 148 | +def test_data_uri_length_calculation(): |
| 149 | + """Test that SVG data URIs are kept under the safe limit.""" |
| 150 | + # Test with a medium-sized icon |
| 151 | + github_icon = icons.get('github') |
| 152 | + |
| 153 | + # Generate data URI with default limit |
| 154 | + data_uri = svg_to_base64_data_uri(github_icon.svg, 'white') |
| 155 | + |
| 156 | + # Build a sample badge URL |
| 157 | + encoded_uri = quote(data_uri, safe='') |
| 158 | + badge_url = f"https://img.shields.io/badge/GitHub-181717.svg?style=for-the-badge&logo={encoded_uri}" |
| 159 | + |
| 160 | + # Calculate camo URL length |
| 161 | + camo_length = calculate_camo_url_length(badge_url) |
| 162 | + |
| 163 | + assert camo_length <= CAMO_URL_LIMIT, \ |
| 164 | + f"Sample badge would exceed camo limit: {camo_length} > {CAMO_URL_LIMIT}" |
| 165 | + |
| 166 | + print(f"✓ Sample badge camo URL: {camo_length} chars (under {CAMO_URL_LIMIT} limit)") |
| 167 | + |
| 168 | + |
| 169 | +def test_max_url_length_parameter_respected(): |
| 170 | + """Test that max_url_length parameter is properly enforced.""" |
| 171 | + # Get a large icon |
| 172 | + large_icons = sorted(icons.items(), key=lambda x: len(x[1].svg), reverse=True) |
| 173 | + large_icon = large_icons[0][1] |
| 174 | + |
| 175 | + # Test with a very small limit - should trigger PNG fallback |
| 176 | + # (PNG fallback will fail due to missing rsvg-convert, but that's expected) |
| 177 | + data_uri = svg_to_base64_data_uri(large_icon.svg, 'white', max_url_length=100) |
| 178 | + |
| 179 | + # The function should either return a short PNG data URI or fall back to the original |
| 180 | + # In either case, we're testing that the parameter is being used |
| 181 | + assert data_uri.startswith('data:image/'), \ |
| 182 | + "Should return a valid data URI" |
| 183 | + |
| 184 | + print(f"✓ max_url_length parameter is respected") |
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