It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://blog-affa21j9e.mit-edu.top/post/1493587206

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "blog-affa21j9e.mit-edu.top",cType: 'managed',cRay: '90fd0309fa7882f0',cH: '_sluL7RfQQlV89ONIXrUGRm6laMxdbu7WOkNvptHhqY-1739200078-1.2.1.1-sIuN_4YeScYDGC7n9j1FAeBKrK6BZ9bC9eKIOvUM3rzmYuR.FZ8dLU93EG4V.kXa',cUPMDTk: "\/post\/1493587206?__cf_chl_tk=_Go_vwJ9UfQOmJ7l88mBxIZyzaTWADQP0LU06VDvPKo-1739200078-1.0.1.1-QuPVgaiaK8C1OwWUmPvmPYkuiD5klIAWor.GT1IG3VI",cFPWv: 'g',cITimeS: '1739200078',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1493587206?__cf_chl_f_tk=_Go_vwJ9UfQOmJ7l88mBxIZyzaTWADQP0LU06VDvPKo-1739200078-1.0.1.1-QuPVgaiaK8C1OwWUmPvmPYkuiD5klIAWor.GT1IG3VI",md: "AHh5szBju8UZESBnzA2AatM_JfPQ9x4Rl.KYNhEVKlA-1739200078-1.2.1.1-0ZHJZ.STBWsAShcKLXJboiEFYbAjbgSuG5yP8eQX3r.cDMj705hgqL8J2IMa4X2KfsBe1Sq3IvVAVaExLhLGW_8OeHSthwGfsyQ614N2gHWnYj9CdAum3vd_wL0Nm2txv.a0b0JqWKqlhGS3VZdQ.ENAxu_xJ7O2F96zhBQ3bIDgsg9z04ihklMwv8A6fCF2hdOqdBh.IF54Opw_40uNbxZbvQqwZV2CPRbfrtkqcZehStX5CMRgwhXq5VKqKzUy9arGzwaKFU8JBv2yJD2mB2eL4D7IFyoqeJN.3JJwIZPdx_Q9Eusqpd8s1iC4T0uJ_THNvegto8eP_NzSkeWTwFFwpApYsbtjacTM0.4o7D8WN0fZwE7Rf_gh20cug7k16zXG6S.jOdBiLBKsk4aAccdQpk9JwH6ZpVMsmWXoFyWuDYcFI9LhFFmRSlLMxt84gQHqVQvScZ6mK3cnknr02rrvaAtY1H6AHJsCVJfXJp6Ef8wTxhl7D7LTjcRGgsKzHqhPuL8FICp8Oo2pn.bGri01shhojVlNygzEjyriIewoZUE192sZY4J11ePDBf3qXFFLuePFcHzVHYk1TFww8yIvwFpuins467E0AF8iDw4ELyLhqEo.BJ5NSK_MaooxRkAflrOs9XkCxQnVCc2GGSiyKTwJ4CH6on2coIpNYrstNuST8Az06dY48vYkaR1GwgdinbR8tPU0JsrE01QhwmPFbofABc3LRsDnaZdMAb.f9uehGm9gfrJGpHvYWqLpazpdaZlFzVJxucqTfvhQ78eQm2RL5DA3zT.kezcirdEAEcGmL1LeIvT4aOdHyh_vwQS5YWxGX15jpAYXkrW5pKHtsIyxEC0NYWwIxr346JgTaRpOB90WgSbqaqUZTCyAm31PhZzj.o4CqrKDWK6qvwE0qHA6N.dyjUxS2aWZM.taRxdmuM8nJz4uQQ0sqDqjPuKpAcw9oYv4aj2xdVmMeTVxX8EiyxFEsoOIrWZRjPA6TtOWPXlZyGTLu_ujBCXacr6mlrufdyIlTNQqnN6dNAJod_2V3fvXNnZC6UoU9rRSlkG67ErTgLEVnFCptsNKBH5VkWfld0Y04Po3QJRlX9Fm1GVohobqHcPpNGgWl2NWGXIskdmYcbULLITSSN4ZYy_uRwcUgaNVLVnkfIxfXk8izVV497hArs5gbCeeBTnqr1Q4lhS6tCDEGXKJ9HpSEQ.FqvtW2XmBEVrzA20KU4gBmnbi1JKB9_EvOK3ojCGHPVTpPJXLgH7ju5.2sT0LIwSKd2OAhkPhQ.HDGg5zxH2OiEretIUMg45XuBZekydpTmclGblh47oKl2CpHALUw0YCKlbNojklsvbJ7Qj2kzcJtj_rVySuRTPzb0gKa4.JD4ii1ANZW4vN6fY25JkLVzT2_uOkqpKyegMtKUgWJa4AMZmLQSMfrRCUjTbyO6ltUdVm9ChR2yOwabWRnnRYIZJ1GUFLooYywPvBZ7ofE4moINQKud7RcePAVJ5uE_lfxlLKLf9yOAtnVTKGDMiRhvN6fzNfYJFkd.hFbxuim4YbAIwmoLAwu7dZNyDnx_V1GB9QspLzSwP4Yjjkt4mHoyH9mcDuDfj3iA_QLs0e_zgVxjbwNBtfYK6x7YcVENZmGythbAVkgDQ.50UZIECsN3RT8CMcfYuMTDMEoJ.OY0J11ZNWIArvaFf7ydxdKOsffTaITMGHYr40h9ZuRfvlBbISY3U2gj.ESNgrrujupmCxmce5zdui_RaLIuXnJfMOsh51Pz9OK6HeiHkfc6DWf93KrDgwVeVTNqQ_oMPmQTZmw_fMqMrbGAm6EFRrpUrQOk0EmCoFxq7QTYJTIOxhy3xwait4qQBsAnXu1sdltO2tkEdvFw8TJUdwdGZ6A0t8FUfReBS4fqoeKjzh2fJzIh0mlXdiLLAh_A3trF2c3UmhNCYzRdEnUGpB6RZAHMlIiTV94ULUKQ5sHCUUY4XEYl3Iiglwjhj5eIKIzgsQg1prrPGIgvwejJ88u8OZNepfVjQY6d_gX2EuImGTKp_U7LZ6lCyjuaYkvF.WeYP8cUdMFcHRU9izqUD743icvSzoiJcggC6FyIEhT5B7zIgZGozzGbNaPtX_b1EZgYErKBi3PmF4dlqtTQu6D1PJX93j7Xqxw5qsT1pU6xpacnE.H_qgVzKI6e5b_0Q43..BvMoBD4gByBW8SV9WgsKQMBiMr.bRfdSm7bjDhjPiUKgq",mdrd: "XE3EcOs1kmZFCijTWJKN2tEX3.rkSPW7OW0rP6Q.zA8-1739200078-1.2.1.1-qbyl7iz2xJh.mpw5yHOQzOPZ.N1FB8SDroRkJv0Hd2BkIHoyfPjCIUB2oQ0ltnBm7ZPfXJBczvQvRq.OoIStjFrrgdVLMuOeaQcOpV6fs2RLGUea20mRpeRlgoP.RxyT2BzHDH8h.sZWgNEou.J9V_4Jsqk9HWLxNVAWv0JLn308G6tvoQMkJZP1lI3wnnf61vDwF4GtqCoZahrZuncwwP2z.UBVagIqPJAnMn96iJwtKiLMLMolfe69Mm7U0y0Zv.WsQcjRhobm16vvaWL_M0NY3H2nPYlTb5U.GMW6sy51E_tsbmFrpOcOaXvUXOGylpBEKvG7FTsz5MMlIIuZHC9HzCyh9mK1JLF5xSNQk9RwD38CzMgiyDOOX4GBzoi21_IgR0QkgEclhwP.0Z.y_mfwNaDAvDZvJkOXyvrG7tPwHOsDaO.rTh2hDofai5TiE26qW5eyw6ouVm1g_teeEJJ4X0.1uuTe.m.3my3rn2Le_Jrhjk8sAV.VbIIDJh6BnehlMs.2Go_7YAGk.c0xoyx8B69ZqF._2EoSP_nBkDIL3DgHeCn9KwsnnzarACYv6eXo1Jsf6rqNirjwp0QPIsD3XQ8Ixtr5579xb0R30reXsXtl9aRpMhxfE1gRAN2BJb8sUDNOXER9ILV3GP7T3IRrV07vBXX_RoRWCWkwvhVAKxo1wtOb0mmHeG77dyVzIlyulxIEbPnHhp9kyYwu68tTXgRFKHoJ8W4mIK4OOF7tqI_83ed5y_RYmmn.onZ9CKBUijrFAR3aFm_h2Fk4vjbDW6jxuhLGVJzdce6ALyH7v0fuIsj2am16dfs6UiJcQymeyQDHJ_tCKNNHidIwaP.vq30RBYUv2HZvfVAexvUVjdiYEWjHWcQVOqmmk8vNfNwpbqOyrzCs2HV_3Fa7LPLY76z9WzCWjvXcQNQaUVazf26HSXdGPq19VQy3B8.mF4Rf73f3xygPLKodc04PxX11mQojSYpDnyoy5PtUMex.jkKmk0dBf8TAM.U_OeGGBxhdySV44uVhouK5KF9t2jF6ZTBngNat5MVPhjJ01I5QlI0SRYlqV5Yy7_rblorQJJOZtU5zaDAcTyLpBS7pZcR5q.CP1ZW6v2X9nj3CSwMoHD3Iu5OQrJDkgqNMKAjxsKIj_kdC4Z_nqK1zVnZoYA3QSt8PIhaSmPswIOIezmKqg4wCSrBulje.dSA2Eknp96.Ii2bi8FtUx81HLsXmufffS7E4TDliobJz2obULBqr43JPJ4Xc4Wh3W5CIHKoAwvK.6h73cwhYHbE3uEkF2sYvEJPgutYIEtZ4V5JzwIm9e1OewtjgobVMz9iw0.saLgc69J5Db1pdLEgZtF5JWEP84GDg8Jyy0ZuC84tIT5_5.SEZzPP0nzuHDxe4Aq1.wj4KuIqLNeHE4raOOLuNOPtuj3RAdvdBOYMyyfhhKyarP9pqPkgsrhmnrncLW1uMZ_9qXqJJJwV.lB_V7mehVomX_5Vvh9n7Gsw4i7Wcg8viaIoy0wckWmDvaePLPE.hTFR8k8RXMzh1r1lEIFldcV57ahA12v_ftUOaCtgnWXmvJ0fhfMMskmNhcV18glQ6vvUMmCsYGLT.9_VuxHHKW1SJc_jC6zGizSZC9JiB35SDISdU4ivTMEQvAa.A6XKYmmVjtHUOiw2_GlHgzr4y3qfSOrLZyrsDq3BCXlFoPsND5VYLe6WO9OyJgB_8psrmJDfxbLbQ1UqYP6vxpd_4DqBx.0er3uqHjU.MbVh33m6fNnGLkzMijGmlAnHmIVhaC_rO5blrkn2IZsFgJVR_FQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd0309fa7882f0';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/post\/1493587206?__cf_chl_rt_tk=_Go_vwJ9UfQOmJ7l88mBxIZyzaTWADQP0LU06VDvPKo-1739200078-1.0.1.1-QuPVgaiaK8C1OwWUmPvmPYkuiD5klIAWor.GT1IG3VI" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda