更长的答案 - 首先,标准...

建议所有 HTTP 发送者和接收者支持,至少,请求线长度为 8000 位元。

事实上,在 boutell.com 上有一篇文章(链接到 Internet Archive 备份)讨论了个人浏览器和服务器实施将支持什么。

(注:这是2006年写的一篇文章的引用,但2015年 IE 的使用量下降意味着更长的 URL 为多数工作。

Internet Explorer 的限制

还有一些研究从2010年到搜索引擎将浏览和索引的最大 URL 长度. 他们发现的限制是 2047 台,看起来与 Sitemap 协议规格相关联. 然而,他们也发现谷歌 SERP 工具不会处理超过 1855 台的 URL。

(信用到 timrs2998 提供此信息在评论中)

浏览器 Roundup

Browser     Address bar   document.location
                          or anchor tag
------------------------------------------
Chrome          32779           >64k
Android          8192           >64k
Firefox          >64k           >64k
Safari           >64k           >64k
IE11             2047           5120
Edge 16          2047          10240

此外,请参见下面的答案来自Matas Vaitkevicius。

HTTP 1.1 规格说:

HTTP 中的 URI 可以以绝对的形式或与某些已知基础的 URI 相对,取决于它们的使用背景。 两种形式因绝对的 URI 总是以一个序列名称开始而有所区别。 有关 URL 合成和序列的最终信息,请参见“统一资源识别器(URI):通用序列和序列”。

正如 @Brian 提到的那样, HTTP 客户端(例如浏览器)可能有自己的限制,而 HTTP 服务器则会有不同的限制。

我遇到的最长的URL是数据URL

Google 图像结果中的示例图像 URL (11747 个字符)

data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAkGBhQSERIUExQUFRUUFxcXFhQYFBQXGBgYFhkVGBkVFxUXHCYfGBojGRQVHy8gJCcpLCwsFh4xNTAqNSYrLCkBCQoKDgwOGg8PGiokHyQpLDUqKSwsLCksKSwpKSwsLCwpKSkpLCwpLCksKSwpLCkpLCwsLCkpKSwsLCwsLDQsLP/AABEIAM0A9gMBIgACEQEDEQH/xAAcAAACAgMBAQAAAAAAAAAAAAAABQQGAgMHAQj/xABTEAACAAQCBAcLBgsFBwUAAAABAgADBBESIQUGMUEHEyJRYYGRFBYyVHF0lKGxs9IjNEKS0dMXMzVSYmRypMHj8GOTo7LiJENzosLh8RVTgoPD/8QAGQEBAAMBAQAAAAAAAAAAAAAAAAECAwQF/8QAJxEAAgIBAwMEAgMAAAAAAAAAAAECEQMSITEEE0EiUWGBkfAyceH/2gAMAwEAAhEDEQA/AOiaq6q0b0NGzUlMzNTySWMiUSSZaEkkrmbw17z6LxOl9HlfDBqf8wovNpHu0hvACjvPovE6X0eV8MHefReJ0vo8r4YbwQAo7z6LxOl9HlfDB3n0XidL6PK+GG8EAKO8+i8TpfR5Xwwd59F4nS+jyvhhsTaKnX69gzGlUiCc6+FMZsMpTuBYAlj0LnFoxcuCG0ht3n0XidL6PK+GDvPovE6X0eV8MIX0jpQ8pe5SPzeKndmLFl2QuPCpMpnwV1Pg345ZuLc4DbfbG0enlJelp/ZR5EuS3959F4nS+jyvhg7z6LxOl9HlfDDCjrFmosxCSrgMLixsdmRzEb45zQUd59F4nS+jyvhg7z6LxOl9HlfDDeCAFHefReJ0vo8r4YO8+i8TpfR5Xww3ggBR3n0XidL6PK+GDvPovE6X0eV8MN4IAUd59F4nS+jyvhg7z6LxOl9HlfDDeFOsNVMlSmmI1gguRhBJ6zsispaVZWclGLkzzvPovE6X0eV8MHefReJ0vo8r4YR8HOsM6slzZk1sXyhC5KoVRsGQuTe+fRFzhGWpJkQlripIUd59F4nS+jyvhg7z6LxOl9HlfDDeCLFxR3n0XidL6PK+GDvPovE6X0eV8MTarSUuX4TAHm2nsELn1vkA/T8uA/8An1RFommbO8+i8TpfR5Xwwd59F4nS+jyvhiTRabkzckcE82w9hibeJIFPefReJ0vo8r4YO8+i8TpfR5Xww3ggDlfDJoCmk0MppVPIlsahRdJUtDbi5xsSq7LgZdEET+HL8nyvOU93OggC3an/ADCi82ke7SG8KNT/AJhRebSPdpDeACCCCACCCCAKJwqawtIpxKlmzzSF+sbD7Yaal6spTyJeWdt/PvY/pE3zig8LVYe7pSnwZZlP1XzPqMdfoyMC22WFvJHZnjoxwS8qzDG9UpG20J9YNWJVWJfGC5ltiXmB57b4cXjwuI5E2uDdmqlplloFXYP6vCys1slI5lqHmzB4SSlxlf2jsXtjXrjpjuelmMu2xAPNkbwk4M9HiZRS5r5mZdzfezE3Y9OQjFybnpR0RxKOLuy8ukNqTXymeZxTFpT3ACzVKZndfZ64sQaKRwk6qpOpjNVbTJViLb1ORB6M7xp4NdZ2mULrNbE9OxTEdpXIrfpAyjKWftatfhWbz6eMsKzY/emvZ/BcazSySzhJJb81QS3YI0S9Y5RNiSh/SFor2qMs1Lz5sw35ZFvJYAeS1oe6Y0KjSyVADKLgjo3Rjrzyw92LV1aVePa/c5tMVLSyfWKXlOEbCzIwVttiQQG6iQYrmite0s0qpWZKnyrK6lGYMdheWUBxKduwbYhauadaUKqSxvxKmYnQLG69RF+uIPBtO7parmOxLcacWZuRYYc+a149Ho5xz9P3mttjnypwyaCfrFwlyUllJAmTJrghbIbKdmJt+V72tfKGOkq7jNGs3K/FgXZcJa1gWwnMXil8LGglpml1cnkNfOxPhLmrdYuOuLdpScH0WXC4caKxHSbXjbq4QWBSh5TOWUpOM78IW8Dy2o2PPMf/ADGLTpLWWVJYIcTzCL8XLUs1ucgZAeUxTuDOr4rRkx/zS568RiHqTpRWFTOmiZMZpzDAiMxbCAADuA8pG0xwRnUYx+D0elwt4VNq+FXyXGh16ppk0SSWlzDkEmLhueYHZG/SGlicSICtiQW+G0UzT2hGrp0l3lrTy0a5UHFNcAg2YryU2biTFolSYjuSTaZ05MOPZw9t1zT+GaHpYW1VHDubkIV1c6M3ImMCu18gizC4YG9wbeyLFqhrizsJM7Nrch/zug9Iiu11VmemFAurFkyIs6nmYfbGkMjM54juAa+cewk1V00KiQjjeBlzHeIdx0nIc64cvyfK85T3c6CDhy/J8rzlPdzoIAt2p/zCi82ke7SG8KNT/mFF5tI92kN4AIIIIAIIIIA5zwvauNNlJUS1uZV1mAbcBzDdRHYY38GOuizpCU01gJ0sYVufxiDYQd7AZERfZksMCDmDkRHPNYOCWW7mZTM0lib2U5X6Bu6o7YZsc8fay+OGYSxyUtUToM6XiBFyLjaDYjyHdHONddCGkp3mynYFib3dmOYO0sY3UGh9LSrKatmX9KUjntOcStJ6lz6xQtTPmOozwnBLW/OVQXPbEYWsM1LVa+xNOaqtxBRaPmT9X1KZsLzCMyW24yScybeyHHA9plXpWpyRjkMbDeUOYbtuItmrugVpadZK+CosN+XXCHSXBtKM7j5BaRMOZaWxTM7TzdUcE05ZHkR6WLLHsdia/p+w41x0ikmjnO5AGGw6SbWA6YpvBroRxSVDlbNOYuFP/KPqj1xYU1JDlTOZpjLseY5mEdKqeSD1RZqWjWWoVRYe3yxnPEsl6/KojvaMfbg/Nsp2olUEnTpRyxHGvl2FfLleLjVTQqszEAAG5hJpjVBZr8ZLJlvzqbZ88Ytq7MmLhmuXH6TXH1RYHrjnxY82LH2tnWyfx8ozlKMpaiv6o0gqKmpmkXlODLAI2oARfrv6oXaO0BV6KqneSFm0z3xBiQcIzBuAeUBlsi+VE6TQU7OfBXM2tdjuivUWl6ytXEjLJlsMlWWJj2OwsznCMtwEel0WN9Ph7afo4d+f9ObM1OV+RRPqzpqfxZssqnYHiwTy2P03O3CN1t8W7WemEvR8xBsVR7Y5vpnVSr0a/dUh3IBzay4gDnZlXJlPNF/oXl6X0chcEY/CUMygOhIOzMi49cb9biUoasT9PC+DnqUoyxtb0JODSk43Rc1B9IzFBvvubeu0V7g802tLUzqaq5CzGPhbFm3sQ3QRsPRF+1a1IWiYmWzWP0cb4c/0L2v02jXrXweSK04yMEze6mxNufceuPMeOXpa5R6vR5owxPDmWzrjw15J+lVXFKC2w2JFrW5oJZGy47YqWh9Adz8bIEyYSrjGWYEgYTYIdwNt0LNKz6FTKOCdeYSEYTJlmNyuR35g5gWy2xST1S3NIxUVtx+C/T5eUVzTFRLl+G6qL2zYCJU6rEulZgzWOdjmRkMrxR9HFKlsU2Xju1uUSVHlF7DymKVZpdGVfpaVc4ZinyGIPddwc/6Ee6T09Yuq0glKpw/ixn0hgPbzQvH5wyB3RpwZ6tzofBlWZMm4MfWL/wAY6VHHNQtIKk4KTYuSV6cIF/bHYZZuB5I6Yu0ck/5M55w5fk+V5ynu50EHDl+T5XnKe7nQRYoW7U/5hRebSPdpDeFGp/zCi82ke7SG8AEEEEAEEYlxzxlABBBBEALQR5eAGJB7BBBABBBBEALQQXgiQVDhO0TNn0TCVclTdkG1lNwcPSL36oS6k8ItOlOkmovJmSxhJZGCtawBFhkbbiI6QVhbU6uyHNymcdEcq0aJq0uK2Zk4PVqiV3T2tcupkTJNIGnNMUqXwsstAcsbuw3bgLkwy1E0GaWlWWTf+JOZPrhrI0NLS1lvbZck2iaIylNadK2RdR3t8nsEEEULFWnSFM+ffeQD2GMpuhlIAsAo5gBlzXHkjXpCdhqnXebPboNgD2gxPefYZ9sceTaTO7FehFU10YrTHDsJt1C32RSdXp9mYc8XjWqtx0zIsss+wEbL3238m6KBTKUmLjBUre/ST7ILgv53LXO0YHF3ucss4q+l1Cmw2RapGkA6AA8q2Qio6Xzc9Bt5TviIkzqtjdq4v+105uLhZuEb7MLE2/8AjHdtHNeWvkjiuq9F8tKJWzIGud/KyC+2O2UIsijojpx8HL1D9X0UHhy/J8rzlPdzoIOHL8nyvOU93OgjQ5y3an/MKLzaR7tIbwo1P+YUXm0j3aQ3gCp8KdS0vRdSyMUYcVZlYoRedKB5S5jK+fNCXSOsLUFItTK4ppMuotULIqHrCUZCos80DAwcrcXAtvztHRHlgixAI5js7IwSlQAgKoB2gAAHqEAcb1jrp7tR90CWZz0tHMdwmFrtpCRZM7WADLdbbRHaYwaSpNyATzkA9PtzjOAPGin1MyeJkyWhc8TNaoOZJeW9mSWoxb7zkCnI8Xui4GFj6GYknuioF9wMrs/F7I0xSUW7IZUqXWGeJrWayvNWZLVmk2aXNK2/GNxjDDcjixbMb7xP1O0g1qWWJqTVMi7KoT5EyxLCqcJJucTA4t6mwEO//QDcHuifcbDeTl5PkozpdCYGDCdOyIJHyVjbcbSwbdcdE8uOUaVfv0VpjSFGtrgUNUS2G0qYQwYoQQpIswIINwN8N4iV9FxoAxug34cGfQcStHLFpSVlytz9IzhMKypwWWJlPJQBUfKbLU8YHa5Yi5tckZb4j6R1pmJIQ4ysxePJ+bqr8U8xFznEXJ4u5CZjF5IsI0EfGKjtlbtn+6jFtXyds+efKZJ27dsqOpTx7N1+/RSmIpeskwvKPGqWeZNU02BclSXOZGvbGL8WhF9uI2vEGVrTUMFJmqqsoZrzKLjFY4TgRceG1i1+Ms1lFhe8WQaorxvG8fUl+czVIGWG4QphBsSLgXzPOY3HVz+3n/4Pb+Ki/cwrwvwKYxoJuKWjXJxKpuy4WNwDcr9E9EbzGumk4VClmaw8JrXPSbAC/VG0xwMuUzTdVhaod85stxxEsz5kktLCI15SrcTH4zGNhvax6d0zSk/C7tNVENS8gHAlpUtHmDjGZrgnkgXPJswyvnDifoQs2Ljp4zuADK5PQt5ZIGXPGJ0ESCO6J9t4vK9nFR1KcKVlXYiXWp0l1Reah4uU5kTCFHGspnDGoGT5LLyUWj06wzcb2nSrrPWWJBCg4GWXd3+kApcm4ysM7xP0nSS5CY5lTPAXwR8iTnuUcXHONIaVeYZhQnAz48LsCS1gCWZFG4DLYIs8mKm0v38EVItNPrJLngo08PPWYFw/I3HJJKq0o2I6Cb7Lw7Zi6qVwm4yxXtfdsjiOg+TxyDkTVmNMA27TiRhzi/tMdH1a1pWalm5MxTy0/wCpT+bv6I8zqPVLUkd2HZUT5GlFbkTJ3EzACcJkckEEA4XPhWvz3is611AViEm8cxa2Li1VQNoNx4RzbZvt5YtdUVmqWlulmzuAHUkb7g7coqWkKeWXzmYiLliLBcs7WG0xlqS2OpRT3Na4ZUlXxctLn9okWAPRe3ZCCvqklhTNJCKQXa1zcnM2G2NldX3O3krdid2UUjTmluOLAeABl0n84xeKt2c8nsz6C1Nl0tQomSJsqYciQrAsLD6S7Rs5ovKCwA5o+KqKodGDS2ZGGYZWKkeQjOOj6tcLmkaeweYJ6fmzRdrc3GDPtvHSculs6Xw5fk+V5ynu50EUzhA4S5VdQy0Mt5UxZyuRcMpASaDZh0sNoggZ7nYdT/mFF5tI92kR6/TdQKlpEiTLmYZaTCzzTL8MstvAN/AMSNT/AJhRebSPdpEel/KlR5tI95OgSed31/itP6UfuoO76/xWn9KP3UWCCAK/3fX+K0/pR+6g7vr/ABWn9KP3UWCCAK/3fX+K0/pR+6g7vr/Faf0o/dRYIIAr/d9f4rT+lH7qDu+v8Vp/Sj91FgggCv8Ad9f4rT+lH7qDu+v8Vp/Sj91FgggCv931/itP6UfuoO76/wAVp/Sj91FgggCv931/itP6UfuoO76/xWn9KP3UWCCAK+dIV/itP6UfuoS13CBOlXvJp2I2hKh2PqlW9cMtfdYVppABcIZmWInYv0j6wOuOYStYqViAJ8u53YhEWTRbDwutn/swv0zPblC6o4VKt/ASVLHkZj2kj2QrqKVZq4kYXGxgb9ttxiFTycQOQBU2ZeY/YYgskGlNM1E9g05yencOgAbI1Sap9jHLyf1eJiy4yFOPsgSJNJ6NLMsxDZl2Hy7jDvRmqM+fKE2eDIyay3znZHaV5UuWd9uVDLQmjONmiw5KWLeXaF8tob6114lSWNwMKk3PPuvHPknXB1YYXyc/07rQaGR3PT2AxNeXyisoG1wrsLsCdzZiKgNcJh2gHovYeqOoap6ckv8AIEKzTXyVwrBhhzOEjZySOqKPwlavJIrDxUsKjqrBUFgpO0gbBfmhjab3W5pkUorZ7COq0tMnrhICrfwVvn+0d8QahcK9JyESqGUQGFiLgWvYbNufkiVRaPUsCflWO4eCv2xvwcz3FujtFO1ssosFPo3CNkOJFOBlbsiZLpgd1rwsrwioaelWlL+2PY0ETdcZGBR+0PY0EKIs+kdT/mFF5tI92kZpoxlq5s8FSHlS5YXO4wM7Xv04/VGGp/zCi82ke7SG8XMTVd+Ze0/ZBd+Ze0/ZG2CANV35l7T9kF35l7T9kbYIA1XfmXtP2QXfmXtP2RtggDVd+Ze0/ZBd+Ze0/ZG2CANV35l7T9kF35l7T9kbYIA1XfmXtP2QXfmXtP2RtggDVifmXtP2QYn5l7T9kRNJaWEsWGbc3N0mEFRpac30iP2cvXFJSSLxg5FU4SaHumt4uaGwy5ahbbATyiT1xUX0bKkgyp8mXMlm9pgQXHltmLDeIuWmtDGYSxuzHeWN8umKvpCna6WDq6XIzaYrdDKcz5RcjmMUU0zTtyiRdH6O7lzkkGXcG5bYpOV3GWG+x7W3GxhnUPgmJNwkKxEuYDbYckfLI2YjPpiLo1iclFjmyW5UsN9JMW5W3qbEcwiZUUSsmFwVDDlIp2E9MaIqe1MmxjCXTTLE2sADmSPZv5+qNrTwtibCwsOoWHsjyTpEXvfqiBwXvRdMsmSoWxFr4ucnMt1xzzhM0gWlcWubTGw+u/8ACJtJrM8pWkk5LmpP5jZqOrZ1QvKrPmLMfwUuR0k9EcMnUj0scE037lU1So6iRWUj4bAzFS+f0iRn0ZmLVwgU6zJs0XyliQo8pdsgfIYx03VJLVSHCFSCrE2sQdsVzSOvTOWAXjQxQsxGHOXe2Dy74v6pu0iXogqbNOlKWQJqSZbYjblqc1vuGLn6Ilyacy7XXaPCGy/SBshNoLRxLYzfEST2xdaWVlHStlRwTlbtI1UtM3QOke2J8pAvSeeIk2fhuu4WYeQm3qJ9cbUfKJM2VnXcEoDb6Y/ytHkb9dE+QX/iL/lf7I9iSD6F1P8AmFF5tI92kN4Uan/MKLzaR7tIbxczCCCCACCCCACCCCACCCCACCCCACNNXUiWjMdwjdFd1hqiXWXuAuf66orJ0rLRVuhepaYxZjtziSKYAXMFNa1zYdMJtKa70Us4GnYmzylqz7OlRaOa7Ot7bInT7bB64q+nESxuCNljzEbxzQ6k10uYgmoxKkb1IPWDsjnusGn509mEviJUtTYzJhzJ/rdaKqLZdyomaO0gXuv0lyY725mJ3kwweVgBLbeaKlq5UOs+7MrclswLBh/2MWOqqMUdEeKOaS32E+kKs3MRJFbYxhpR7XhUk/OBdIbaxVWGUk4C5QlWGzJtnrv2xWDrZUNbDhHNlf2xYhVo0tkmHJhY9Ytfq2xTaeyTCh2gkQUU92Rqa8ktKabPcNNYsen+Aiy0ur4w7B/XRGjRbDKLJStEsiyFQ6NwQ2krG1ADGdoEEGvTIE7M1bnwttHq7QIjUk3aMsjbKJ1QpIOz/wAZ/wAIU0rWII8Ell+rYr/yMo6oENETXH8Qv/EX/LMgjVrY/wAiv/EHsmQRJU+iNT/mFF5tI92kN4Uan/MKLzaR7tIbxczCCCCACCCCACCCCACCCCACCCCAI2ktIJIlTJsw2SWpZj0DmG8nZ1xQ9FV06oxzZieEz2IZWUKLALcbCM8vth5wiOO5kUnJp0rF0hG4wr03wWhZQYjLliWyqgVsa2uSLckDPLbc9cYZW+DpwJNskzKdZkoq+ak3YZ5gbsorGlqKo5HEy5EhA2fJVppG4g7Fi20RHqjHS6y5aGY27dvJOQHbGG5vSIFIjvSGXNILMpBPSRutHJ6PRGF2lsFLKx8LM7TZgLx12bWGWoxAGwJYXOX6KhRY+XojmWtrsanjVTApCEc9xe/tjSNoidPcgz6cSXuOSDtPSdvrhgKvLtiLpar42QjsAM8+Y2F8vqwpl1eIReBSaR7paqGcV6dXc0SdKV6DInEfzR/HdCGfVYtgsPXGiRk5JEv/ANQzzMRqipxOGG3n540IhOzOJlLo5rgmJpGdtj3RM05RaqJ9kJNG0NgMosFLIirLDKSY3mNUhY3QLGphCgyQFmS+kzFO84Lkj6hb6sOmtzQs0rNw4XIyUi/kG0fVxwIsrGtE+8hel1PYr/bBGjWRMMsp+ZNw9gbP2QRJU+mNT/mFF5tI92kN4Uan/MKLzaR7tIbxczCCCCACCCCACCCCACCCCACCMZkwKCTsGZPMBHL9M8KFUj4pcgcRnZsLM5A2Ne4HVaIbolKyx8J8g9xiYL/IzEc/snkseoNfqip6L00qSprXJIQ2A3ndaPJuvU6rknip6EOpBUykZTfapG7LKKVU6Sm0qEPJJVd6E7M8yG2Z9MUmlI0x3F2dXoaobbixF73sPXEfSFfLqMBluk0SHuwVgVBIKjEwyyN8oV6BoDOQvjIp3QsQcjY58l/orbbeEentEzzTzZVCVlyULTLl+XMxMzcmwyPhZnIgC0ctNbNnb/LeiyS9L8ZMeXxb4EyLS2DMx/NXZbrMUrXKRLIPFpMF7hnd7ta4soW5z3E7umHupFSkuQsmbMCTAobDiF2VxcOrHwgYg61PJlqZha43AsLX3xZNJktbVRWa2eeIKW8HG5G+wTPsAikVWlGa4GQ9f/aGtVrNdjgBINw99hUixUDpBOcKe4jcb75jMEkbjtjoiqVnHOduiOkgnZEyRoy5zhjQ0UP6XReyLWRSFtBoQc0O5OhgAMomU1HhhnJl5RWwQaaitu2QwlSbRmsrbG1RAbGKrAWj1oxw5wDMTOA3wk07Xji2sCfZmCP4w5NGp2mItfopDLdQCSykDywRUpes98KEjNlkMfKZVifrAwRt1sQ8XTk75YHUjTQPbBFgfSup/wAwovNpHu0hvCjU/wCYUXm0j3aQ3ixmEEEEAEEEEAEEEEAER6yvSULu4UdJ9g2mN5jmGuPGPVzFLELkMtoWwyHNe+ZgBjrBryZyTJVKBYgo01mK2vkQoCm5t2RU6PRzISWfFcWwm5C8+Em1weYqIYSKUKBYWAHJXmHP5Y3NLvbCL+zrivJZbFfp9XpSzMa3XI4jiwLYZ4mUc3PD/VWZJqJU2fhunGFUxC+JJdhjI/Sa58kIeEClcUE0qxBDIZgX/wBsmzD2Hqir6P14aRSKktOQOTibJSeYWzYxnkTpJHRhatuTOx6fnKlFPGXKlMNmXLFrW3ix2RQNBz5lLo6peobGzLxcpDbGoIIQdNy+Q6Ir0jXPSFUi8iW0sEZEEXw7iQbndDebo+qqQHnTBLtmqyltZtxLG5yO6MtEmzdZIRWwv4SdFsJdMLANT06BiLfo5AjMi5aKJS6Omzdocrz5ke2LbP1QdzypztuN2LXt5TzwxotD8UAAY2itKowm9TtCSi1WVVzxXPOsZzdXbC46ujp6IsoQ3zjY8sdkWszoq66OZTcE23DbDPR1Q+NFZMiwBN7WB3wyMiMRJOVjY559Fje3qiCRhS4XF12XI+qbRLWTCXV2vExZgAsVc3XmxAW9Sw8R4FWzUVzjLDGUyMWgQYPGlo2PsjVigSjB0J2Rom07WzcjyRumOd0RZxO9rQQKjrI5NNTm98M2ol59Dlh6ngjTrBOvSfs1Tj60tWv1wRcg+ntT/mFF5tI92kN4Uan/ADCi82ke7SG8SZhBBBABBBBABBBBABFA1vlWqybZlFNycuY5b90X+KrrzoZ5qpMlDE8u912YlO4Hnv7YEoqZmDfnEWv0sJY5TLLHSQIrGmdYpiXUypyNzlMI6nYgdkUvSemHxZBAx2G/GOSeYnZFbL0W3TGvKKpwqZl7i7AhSDlaxzYGOe1pdwGK4VXJVGxbnd1mL5onUc4VadczGFyTc2vu6IZay6qqKOYFAxWuOrOJJ2o91V0ZhkJ6uuLEq2hdqNVcbRym3qMDeVSYczEteIoiyvTB7THkoA57hGufMyyjLQrpMqJcqYWCvcEqM72JFtu+Ktl0nZJ4sWuRGlpUM63Qc1GAU4kPgllIbfttcbo1Po6YQMLSzf8AauOgjdGfcj7m3Zn7EBTESsrOLRiou2xRzsxFvYYw0hPmyWImIR+kMwemE1Fp5nntLSWrPiBR5hISWqqbuQNubHfuEXW/BjK4umM9ELMlTFM0j5RgpFrZkgAk7znFmEUDTelpTVEsS2edxIQqEyDzr3ZjkbKMrW23i26PrnYIJoCzGUtYAgXv4Iub3sR5bGJoqT5hyjXijya2XZ7Y1loFj2Y8aXaB22xGaZeBVmUyZEOeyjMtGUx4jzp6jdc3ggVTTDA08y17d0j3WUEeaRe8qcD4wp/wzBFyD6m1P+YUXm0j3aQ3jjOhOGviaanldyYuLlS0xcfa+BFW9uKyvbniZ+Hn9S/eP5USZnWoI5L+Hn9S/eP5UH4ef1L94/lQB1qCOS/h5/Uv3j+VB+Hn9S/eP5UAdagjkv4ef1L94/lQfh5/Uv3j+VAHWo8ZARYxyb8PP6l+8fyoPw8/qX7x/KgDoOldV5M9SrorA7mAI7DHNtIcGcmlq+OC3VjdUOxWHN0b7RI/D1+pfvH8qEmsHDDxzJelsFGQ4++Z3/i4EofvttGGk5eKWR0X7BFK/CaMV+5z/fD7uMn4T/1c8344fdwZayZwZvZamUfozbjri21Y5LdAMcr0JrqJFRNdZJIbavGW38+Dp5od1PCeGVh3MRcH/fX/APziEHyTpi5eS0RtXah0r5BlhSWYpyycIDixPJzBtCl9eBhtxG3+1/0QrbWrlAqjKQRZhMsR0g4cjGbWxrF0z6CSVMBPGFDllZCvPvJN4rFU6hyN4Ym4y6M4rVNwrpLyWkbmN6t3v9dDCbTPCIZkxmEnDls4y/8A0COVwZ3RypeS+mSk9XJyFsIJ9ov0xzuroFxvLa112dKnMRjo3XtsT4pZZQQQvGWtl0qcoX6w61ibMSYsoowGE/KAgjIj6A2XMbYk06Ms8oyjZIoQZFwlwp2hSUcdIcZnyHKM9I6XqJeAy5gmS3ORmAYwwzKO4355c8KH1iuPxeY34/8ATEd9NXlzUKZTBfwvBZSLMMtucbnEdGpaovKRmtcjlW2XGREeu0U3R+t+GWimVeyi54y1znnbDG5td8/xJ/vB8ERRNloZo0WiuNrt/Y/4n+iPF1z/ALL/ABP9MKILCZF9sApQd1+mESa4DfJJ/wDst/0RtbXUW/En+9/0QLEPT1EqSph3mel/7t4Ig6X0+JqOOLteYreHfYrC3g9MeRJFH//Z

更长的答案 - 首先,标准...

建议所有 HTTP 发送者和接收者支持,至少,请求线长度为 8000 位元。

事实上,在 boutell.com 上有一篇文章(链接到 Internet Archive 备份)讨论了个人浏览器和服务器实施将支持什么。

(注:这是2006年写的一篇文章的引用,但2015年 IE 的使用量下降意味着更长的 URL 为多数工作。

Internet Explorer 的限制

还有一些研究从2010年到搜索引擎将浏览和索引的最大 URL 长度. 他们发现的限制是 2047 台,看起来与 Sitemap 协议规格相关联. 然而,他们也发现谷歌 SERP 工具不会处理超过 1855 台的 URL。

(信用到 timrs2998 提供此信息在评论中)

浏览器 Roundup

Browser     Address bar   document.location
                          or anchor tag
------------------------------------------
Chrome          32779           >64k
Android          8192           >64k
Firefox          >64k           >64k
Safari           >64k           >64k
IE11             2047           5120
Edge 16          2047          10240

此外,请参见下面的答案来自Matas Vaitkevicius。

实际上没有普遍的最大 URL 长度. 最大长度仅由客户端浏览器选择支持的定义,这在很大程度上有所不同. 2.083 限制仅存在于 Internet Explorer (所有版本高达 7.0). Firefox 和 Safari 的最大长度似乎是无限的,尽管不稳定性发生在 URL 达到约 65,000 个字符。

我有 SharePoint 2007, 2010 的经验,在 SharePoint 中,您可以从服务器侧创建的 URL 长度的限制,所以它主要取决于 1) 客户端(浏览器、版本和操作系统) 和 2) 服务器技术、 IIS、Apache 等。