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-afffxue7o.mit-edu.top/post/1508724396

  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-afffxue7o.mit-edu.top",cType: 'managed',cRay: '9107b3c42aa1ff18',cH: 'rEROazfd2PFbvg_AYZJXa0DFjkdxgoLbe776IHl4l_U-1739312174-1.2.1.1-EHvXUu8gFCKbUK5nsIMf4lrSisXDv0n1ViBD2Sv52CXsnlzQtdL8WtkeEMVjk_BP',cUPMDTk: "\/post\/1508724396?__cf_chl_tk=VIGZqX7ZStgiGAXP0mDd6hbULh8hnH5hcHTXuGwPfZk-1739312174-1.0.1.1-3LObeB8RBrvy6M9YkOv2RgtN9RLNW2Ifw3DUMKnduy4",cFPWv: 'g',cITimeS: '1739312174',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1508724396?__cf_chl_f_tk=VIGZqX7ZStgiGAXP0mDd6hbULh8hnH5hcHTXuGwPfZk-1739312174-1.0.1.1-3LObeB8RBrvy6M9YkOv2RgtN9RLNW2Ifw3DUMKnduy4",md: "nwxGrGCMh7lekNPJpbnprDyPt3sPrUnFpebGpyCBPIw-1739312174-1.2.1.1-4V0nQGu6D3KLMnmiFzx9f9Uw_Elnl72VU.5xO0tP_aj16KcHUoTFtBT_hVftRxOClWG00xeD2Pr5Zaegm1hUBSDb8KspgPrGGMV5koQxOln4QtVKFqVr6h_ZF3OcWVk86WZPCql_P7HBqxV_43EcVxV54m2PAvSpus_4leZAtb.5w5gY_s3ikQoFqeg4pep0CvYM98pajpjj1a_G76x_Df35D.D1HvngVW2EuR0.SRXlOSdTTdTtDXw.cEs.Zg1kg5iRv0IktVMvS37plHboR1lIDuV4SBbUOMqGDDl27ixYTIxl8BdRcM5ApTHOjAqUz0LNZ2eavXRqAXtVj1NiOFsy7L38b8kQfRCDZq9apWMPPaGkiskVBeJgJJUCWgCDkXsz32OfMAYObwMBvDaJB6aKMzL_kqWB9hduRLFTGBDVp4pte5vpzVByHlFUo4CCOV7grQxgmeJiBR8.nR2Wy4ou7dEYPtbxKBKkjBJpBK6qvERLi.BFDmf_ROCrkPZVF3fuhjP6q6vt347USJEQBmei0iatP8jirAOQm6x21yUPtRLf7dETHftcxwoZJe_FHRBQeBQFHeeWzzxvoYuP0WNwTHr44E5YTKerJQqZRBxObCXnkGYdaALszzSBmDkYdM5i1Yv1kmSnRUhmlygJLp_OInwEfpwT_SYiwe5K3ZSLD13w7FC5F9AmEuP_LfD7JZwjzaLKlFFKnc93sMnqb1xePllY151oE3fAjYC5nI1i6YK5CCtP8bXkoILqNlZUmITKrCvxpTlp.mX3NF3cZreb0pHh5uYyZCvZ6lVYMLjUbej9O0Dz82DK1K1vQLjtKTS_quIBxe5S3m2T4fR9044KtzxI_xVXBMpJqyENds4v.nTj6aTAACQaRGysGclCqWhIEbY_b08XbTBZRO_yKAslFFX0nGgeSti1DMiT2jkQGOfIr6jeVk.bZLB3A0hDwxedHwUw7TZYUtxd67IxOJRNuQu3GN_lkO0C.4qxqaLEixMcm5sZ4SSZRN.xyOzIrFxvXDNoI4_PaI3tNH5bEgECVqN4Tzfco.ISSodYz6a28AXU8Tk7P.FqS.1_yhrcBDQMzISDLi20m0RuXLdKjGB6O9BatkTNUOu8q1X.m3776JSuw1iZXloN8DUgLXzT.3HlgmU9IhEWcibdJjl0yZLMsItQJ0wheCaPLYDRlQIstb26nC5jIhXxxYcxRmLJp2iaFooCPnPQx2ErV_jLZP5bCy..xqcgoAEVillkimGC8ItBHfJ6vkJe8KmpNMJG7CftFeWXoX45YELLKZvxsfz4VsLre8H883ImR4nIRj1n7dTg0UaZ7kJ8m5UZl_Qz_bB766ilXziW6cqAFUNSfmhbNJmMRvdPH9eQPA_rLiglelrstd4XEzGB3jrQ2Iqb6gevSBy4mhrml_8Q5z7QTc__XQWdhpCtFqUSZP0dskKJ94q5cRU1WNCeafMIvHRoPCXXD2E6fGz6xiLR_xnnab8Dk0XUvpwXpPM.BUldV3hB1P0.skC0oHul_TDG765Y4IXdhR0deBFnxvba8RqdOykcgG4FYAZh75iZ_tCcdlqO7npoCWGPr8qNXTlQSfSINd7bX88CMP.XuB54CAUxP0i.kgi3Q5W7OFRlHvI1f7qkCO_C.6ipXsMk627OXajwWzvjOY2Hz0p.t5MUPlrvGrO360xrPh9grC_whHOWQ6wuOz.zFdZ8QyMI0Vs4xaStOr.HndyKLjGTxgCH3.3t22mUW07oLJUAhBDQ2nGsF_pS8v0BQw6b.2sZJec51tm.UeTSAqFdLGDB6qyc2UrOiiTETr_NMQuFB9q0gZWKmSEUjdLtTovkRSVQ0ZBduKZLnkIxl3kbUp0vAvBIGYMyGF8W9.mYLncPfL.j89BEKfb4uw6PvBdLJiqFHwYkUp6uC9xxtgo7s2qzrYBOYsoTgjnR1knYyVJMt7OXnV.bew2FIi2Gujhk0k2U77XXAszipaUXkd0osxMQ_zjdc2oVfP_m45W_N1RchtuxAipwoAn8sDzH2k0dwg6Y6azBOE6zLEGUPRupOoC4tmUokbYEPsOPKJXpFyAlz5qhX3z2Z7z50wVsNpqXk1MR_1uIq7aIQF4_EEnmFAQCfWAP4Z5u5jI95BMOl83XYX7PSCppdener9.1CvkwhAYCodibcRhtJNaQAg8WBbLNR1L1JXEvEaQkQhKjveoQrluL9JDNmjxq9BRHpWa_FpZwMTQl8mjB",mdrd: "o_Qzx_KB91Zvz3vKPD2dt4fhR0jDP7zqzEax8OhPZIE-1739312174-1.2.1.1-Vj2.6Y9Two9Z26I.0R.KAw_adV0Dv8iKKQb12QIEFqkFsBvFZzsuSgREXa38maLKzTsbJqD6_YmbcPJl4o_8rHNIh1QHLxlh3ZAGcy1UtxsSrBt9Z6qL_M8SJth7WjNkbtFQ8aBNo0u6CAcaO8E1trhILaiDuI_RpwjwRkUQKkvXwnOyQzUSFCKMbNmOn7e_i58yvLHZvAagYuQJMuK9VVLKvdq.i482j8.1v_WFnaX6K6PUnR10xzqILI3rFOBz7qb1aSTS5xCJdGYeM2TRyoQ8PEU2ULbcsiE1HgNKUjp8m7bF_ePLdUB5S7GJYQ6IcwYgRdsM0l15jyQWQyMq7aQ4lWcWHlo3pBSqMDNoQ9i_EnY66CzCRuLUbquMUIhwh5qh0DipLFLakTwUiQ18vxGpEzSUcsQNpWSo7G5xXjIj2kZVplB5T3.DA3XfuAKxXRF2Mgz4dJE21AXvLAg59mR25kyeiGrp8kAjKeSrHRAXwwjXwunWt.xp6tyis0jUCCBnpbcAqVtV4tptqFdQbPeMj_CwAD1Ol5Vr2XbJIyqt6BUe9PBeIb7dcL72gdN7zf0xBT18kKnoUnoJWMsVh2H63nJrodvNuh1atgYD.HBnzCyK5v0uDla.am_zJKb.jLyoabZ2uQNY3rUx3qqUoL4OrGYz4QZDSUCUG7EoxsVjrnGhvnQnNoBfuZz_CeC3HkQcVuMS1czbIa_xyZMfuaun_cMmwlT368WwUELwTO0t313gB2cjBAzxZ64v22ex0EMTAqrxNPXNSjqht1m5mgpsckRAhVHRcpXY4zwlRm945XeMP8b4gkY7sCq_q0bjpD61MvthHwDdS0nF_GTNWCLB2RqPexZQ.VnMUa6LiCRGSvf5vrSs3lMx64zR3d47TgBFFjUWTPLr2KDg7ZKUfTGRPWhNz.I6BML8D7.hpjKg0eg23DOtXzVg64.WmoGYrC9SIwp8V7e3U3P73vwsyqoExU9vJGmV4E2ffBhgKZe0_eIgZFIzQ6VDP1VJ0_J1Kpy.2B0R3IrOoYfvjNEUhC2_YcUOrkO13QpRb3QjOQBXK7aV9MMAB8Y3iCUBwYygDTXc2sSwCTE3FZa_smlpmvyt8omsnCtjNifWakV9lie341lEhc_Myrmv9Y_3GMm3IC1a9OIwu5k5n5J_9_T9.DyY9o4O7KHInWMCp44jKcSmlRInTmkZrvWDhcNahHLxs.UCm6oCrc0LPng8FVbMN8YypQLnIyTLA1.VoETtS1Xt0tx4v_yVV8sWZTu_nn_0b45N4oxSYbi7lkZfWqp7X.UK9smfCsBPk8hok_HxGE8GDlcibkiSAVrEI2Gln4S6kZxgx0ijyCEAApBZg4rRxTaT6qCgP2AhC1L3XORVQvlw5xIXN1yADnrjppq3OAjOUxuSZNfAX8DONhIGLNmh_7Bl.UBNhne.N6aLyDXLWQ60gboKW0j1cusTmK2i33EjGYdFQNyCYUKFvB9sd7lmXCZuTd_cki9JdXvSXAlRBE.zfU9eg5jvEbRRtrLLn_jlTGCmszbD3BqwsN2WzhiVVdLQ.SJYu5A5Q1zwlVEBc.gzwsExRGEYrQ2qvnrwccSRuyXdArZcLGXa.PW9OloH2nnPdwQUIucl6ieDqtEH4DY9LzNaQha51i7Efn2O5XNmRePOQZkMqxclz4z_JgPMXicJo97GFL2XwEr7eI3goKFIVfNE8ab.PXEpRpR6h.kLFy3SXaBuAEEJ8lJTNyGbgnlsAIY8LdZtMHPfEYTjWB_3Z8oQcJMqSH8j5Nht9y1RoTTsM0sDHCkWrdxJSyT4dhTUW7QrrBkameVCs4Tx2pE"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9107b3c42aa1ff18';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\/1508724396?__cf_chl_rt_tk=VIGZqX7ZStgiGAXP0mDd6hbULh8hnH5hcHTXuGwPfZk-1739312174-1.0.1.1-3LObeB8RBrvy6M9YkOv2RgtN9RLNW2Ifw3DUMKnduy4" + 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