If a library's samples page does not yet include a sample for the
Google Digital Asset Links, you can still use that library, and you might be able
to adapt samples that are provided for a different Google API.
Python
Here is a simple Python example that lists all statements
made by a given website, then checks whether that site makes
thedelegate_permission/common.handle_all_urlsstatement
about a specific Android app.
Here is a simple JavaScript example that lets you list all statements made by a given website
and also check for the presence of a given statement in that website.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[[["\u003cp\u003eThis page provides code samples in Python and JavaScript demonstrating how to use the Google Digital Asset Links API.\u003c/p\u003e\n"],["\u003cp\u003eThe samples show how to list all statements made by a website and check for specific statements related to Android apps.\u003c/p\u003e\n"],["\u003cp\u003eBefore running the samples, you need to activate the \u003ccode\u003edigitalassetlinks\u003c/code\u003e API for your project and replace \u003ccode\u003eAPI_KEY\u003c/code\u003e with your own API key.\u003c/p\u003e\n"],["\u003cp\u003eWhile Go, Java, .NET, Objective-C, PHP, and Ruby samples aren't specifically provided for this API version, you might be able to adapt existing samples from those languages.\u003c/p\u003e\n"]]],[],null,["# Google Digital Asset Links Samples\n\nSample code is often the easiest way to learn how to use an API. For links\nto Google Digital Asset Links samples, select a programming language below.\n\nThe samples use the Google API [client libraries](/digital-asset-links/v1/libraries).\n\nIf a library's samples page does not yet include a sample for the\nGoogle Digital Asset Links, you can still use that library, and you might be able\nto adapt samples that are provided for a different Google API. \n\n### Python\n\nHere is a simple Python example that lists all statements\nmade by a given website, then checks whether that site makes\nthe `delegate_permission/common.handle_all_urls` statement\nabout a specific Android app.\nIn order to use this code sample, you first need to activate the `digitalassetlinks` API for your project, and you need to replace the string `API_KEY` below with your own API key. See [these instructions](/digital-asset-links/v1/consuming#validating_using_the_api) if you are unfamiliar with the process. \n\n```python\n#!/usr/bin/python\n\nimport urllib\n\ndef ListWeb(source_web_site, relation):\n return urllib.urlopen(\n 'https://digitalassetlinks.googleapis.com/v1/'\n 'statements:list?source.web.site=%s&relation=%s'\n % (urllib.quote(source_web_site, ''),\n urllib.quote(relation, ''))).read()\n\ndef CheckWebToAndroid(source_web_site, relation,\n target_package_name, target_sha256_fingerprint):\n return urllib.urlopen(\n 'https://digitalassetlinks.googleapis.com/v1/'\n 'assetlinks:check?source.web.site=%s&relation=%s'\n '&target.android_app.package_name=%s'\n '&target.android_app.certificate.sha256_fingerprint=%s'\n '&key=API_KEY'\n % (urllib.quote(source_web_site, ''),\n urllib.quote(relation, ''),\n urllib.quote(target_package_name, ''),\n urllib.quote(target_sha256_fingerprint, ''))).read()\n\ndef main():\n print '================================== List() Output ======='\n print ListWeb('http://example.digitalassetlinks.org',\n 'delegate_permission/common.handle_all_urls')\n print '================================== Check() Output ======'\n print CheckWebToAndroid(\n 'http://example.digitalassetlinks.org',\n 'delegate_permission/common.handle_all_urls',\n 'org.digitalassetlinks.sampleapp',\n '10:39:38:EE:45:37:E5:9E:8E:E7:92:F6:54:50:4F:B8:34:6F:C6:B3:46:D0:BB:C4:41:5F:C3:39:FC:FC:8E:C1')\n\nif __name__ == '__main__':\n main()\n```\n\n### JavaScript\n\nHere is a simple JavaScript example that lets you list all statements made by a given website\nand also check for the presence of a given statement in that website.\nIn order to use this code sample, you first need to activate the `digitalassetlinks` API for your project, and you need to replace the string `API_KEY` below with your own API key. See [these instructions](/digital-asset-links/v1/consuming#validating_using_the_api) if you are unfamiliar with the process. \n\n```javascript\n\u003chtml\u003e\n \u003chead\u003e\n \u003cscript type=\"text/javascript\"\u003e\n function executeRequest(request, outElement) {\n var xmlhttp = new XMLHttpRequest();\n xmlhttp.onreadystatechange = function() {\n if (xmlhttp.readyState == 4) {\n if (xmlhttp.status == 200) {\n outElement.value = xmlhttp.responseText;\n } else {\n outElement.value = \"Error running request. Response: \"\n + xmlhttp.responseText;\n }\n }\n };\n xmlhttp.open('GET', 'https://digitalassetlinks.googleapis.com/v1/' +\n request, true);\n xmlhttp.send();\n }\n\n function executeListRequest() {\n var sourceWebSite = encodeURIComponent(\n document.getElementById('list_source').value);\n var relation = encodeURIComponent(\n document.getElementById('list_relation').value);\n var outputTextArea = document.getElementById('list_response');\n executeRequest('statements:list?source.web.site=' + sourceWebSite\n + '&relation=' + relation, outputTextArea);\n }\n\n function executeCheckRequest() {\n var sourceWebSite = encodeURIComponent(\n document.getElementById('check_source').value);\n var relation = encodeURIComponent(\n document.getElementById('check_relation').value);\n var targetPackageName = encodeURIComponent(\n document.getElementById('check_target_package').value);\n var targetSha256Fingerprint = encodeURIComponent(\n document.getElementById('check_target_sha256_fingerprint').value);\n var outputTextArea = document.getElementById('check_response');\n executeRequest('assetlinks:check?source.web.site=' + sourceWebSite\n + '&relation=' + relation\n + '&target.android_app.package_name=' + targetPackageName\n + '&target.android_app.certificate.sha256_fingerprint='\n + targetSha256Fingerprint\n + '&key=API_KEY',\n outputTextArea);\n }\n\n \u003c/script\u003e\n \u003c/head\u003e\n \u003cbody\u003e\n \u003ch2\u003eList()\u003c/h2\u003e\n \u003clabel\u003eSource Web Asset:\u003c/label\u003e\n \u003cinput type=\"text\" id=\"list_source\"\n value=\"http://example.digitalassetlinks.org\"\u003e\n \n \u003clabel\u003eRelation:\u003c/label\u003e\n \u003cinput type=\"text\" id=\"list_relation\"\n value=\"delegate_permission/common.handle_all_urls\"\u003e\n \n \u003cbutton type=\"button\" onclick=\"executeListRequest()\"\u003eRun\u003c/button\u003e\u003cbr\u003e\n \u003ctextarea rows=\"20\" cols=\"80\" id=\"list_response\"\u003e\u003c/textarea\u003e\n \u003chr\u003e\n \u003ch2\u003eCheck()\u003c/h2\u003e\n \u003clabel\u003eSource Web Asset:\u003c/label\u003e\n \u003cinput type=\"text\" id=\"check_source\"\n value=\"http://example.digitalassetlinks.org\"\u003e\n \n Relation:\n \u003cinput type=\"text\" id=\"check_relation\"\n value=\"delegate_permission/common.handle_all_urls\"\u003e\u003cbr\u003e\n \n \u003clabel\u003eTarget Android Package:\u003c/label\u003e\n \u003cinput type=\"text\" id=\"check_target_package\"\n value=\"org.digitalassetlinks.sampleapp\"\u003e\n \n \u003clabel\u003eTarget Android Certificate Fingerprint:\u003c/label\u003e\n \u003cinput type=\"text\" id=\"check_target_sha256_fingerprint\"\n value=\"10:39:38:EE:45:37:E5:9E:8E:E7:92:F6:54:50:4F:B8:34:6F:C6:B3:46:D0:BB:C4:41:5F:C3:39:FC:FC:8E:C1\"\u003e\n \n \u003cbutton type=\"button\" onclick=\"executeCheckRequest()\"\u003eRun\u003c/button\u003e\u003cbr\u003e\n \u003ctextarea rows=\"20\" cols=\"80\" id=\"check_response\"\u003e\u003c/textarea\u003e\n \u003c/body\u003e\n\u003c/html\u003e\n```\n\n### Go\n\nThere are no Go samples specifically for this version of the Google Digital Asset Links.\n\nHowever, you may be able to adapt one of the other [Go samples](https://github.com/google/google-api-go-client/tree/master/examples).\n\n### Java\n\nThere are no Java samples specifically for this version of the Google Digital Asset Links.\n\nYou may be able to adapt one of the other\n[Java samples](https://developers.google.com/api-client-library/java/apis/).\n\n### .NET\n\nThere are no .NET samples specifically for this version of the\nGoogle Digital Asset Links.\n\nHowever, you may be able to adapt one of the other\n[.NET samples](https://developers.google.com/api-client-library/dotnet/apis/).\n\n### Objective-C\n\nThere are no Objective-C samples specifically for this version of the\nGoogle Digital Asset Links.\n\nHowever, you may be able to adapt one of the other\n[Objective-C samples](https://github.com/google/google-api-objectivec-client-for-rest/tree/master/Examples).\n\n### PHP\n\nThere are no PHP samples specifically for this version of the\nGoogle Digital Asset Links.\n\nHowever, you may be able to adapt one of the other\n[PHP samples](https://github.com/google/google-api-php-client/tree/master/examples).\n\n### Ruby\n\nThere are no Ruby samples specifically for this version of the\nGoogle Digital Asset Links.\n\nHowever, you may be able to adapt one of the other\n[Ruby samples](https://github.com/google/google-api-ruby-client-samples)."]]
