[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-17。"],[],[],null,["# Web Risk Lists\n==============\n\nThis document applies to the following methods:\n\n- [Lookup API](/web-risk/docs/lookup-api): [`uris.search`](/web-risk/docs/lookup-api#example-urissearch)\n- [Update API](/web-risk/docs/update-api): [`hashes.search`](/web-risk/docs/update-api#example-hashessearch)\n- [Update API](/web-risk/docs/update-api): [`threatLists:computeDiff`](/web-risk/docs/update-api#example-threatlistscomputeDiff)\n\nAbout the lists\n---------------\n\nThe Web Risk lists also referred to as **threat lists** or\nsimply **lists** are Google's constantly updated lists of unsafe web resources.\nExamples of unsafe web resources are social engineering sites like phishing and\ndeceptive sites, and sites that host malware or unwanted software.\n\nThreat types\n------------\n\nEach Web Risk list is named (identified) using a\n[`threatType`](/web-risk/docs/reference/rest/v1/ThreatType).\n\nList contents\n-------------\n\nCurrently, all Web Risk lists consist of variable length SHA 256 hashes\nbetween 4 and 32 bytes. These hashes are based on the suffix/prefix expressions\nof the URLs associated with unsafe web resources. Note that the URLs themselves\nare not stored in the Web Risk lists. For more information, see\n[URLs and Hashing](/web-risk/docs/urls-hashing).\n\nWhen using the Lookup API to check URLs, the client sends the actual URL in the\nrequest and the Web Risk server converts the URL to a hash before\nperforming the check. For additional details, see [Checking\nURLs](/web-risk/docs/lookup-api#checking-urls) for the Lookup API.\n\nWhen using the Update API to check URLs, the client must convert the URL to a\nhash and then send the hash prefix in the request to perform the URL\ncheck. See [Checking URLs](/web-risk/docs/update-api#checking-urls) for more\ninformation about checking URLs with the Update API."]]
