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-affi4qqhe.mit-edu.top/post/1572496038

  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-affi4qqhe.mit-edu.top",cType: 'managed',cRay: '91103cea28878293',cH: 'z2CqTJ032cN.pVIREX4jNRZqCh.9iKs6YRWOaa5ogZ8-1739401678-1.2.1.1-rbvFOn_n4zqlFS0.ptcOZxcdcVOR676HR9couJyVUmr1DK6.ly3LKNHGUPdAZ7L3',cUPMDTk: "\/post\/1572496038?__cf_chl_tk=MUgKHzdmCSYZhk3wnFlZXCcu84W7VigQLHfpB5t6DGc-1739401678-1.0.1.1-oPmrMzrtxEazAt6QBk7KOp_xXUmTphYcv8XanMf6owE",cFPWv: 'b',cITimeS: '1739401678',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1572496038?__cf_chl_f_tk=MUgKHzdmCSYZhk3wnFlZXCcu84W7VigQLHfpB5t6DGc-1739401678-1.0.1.1-oPmrMzrtxEazAt6QBk7KOp_xXUmTphYcv8XanMf6owE",md: "xUKgnUnLpstRYUNjV78grnUj6JmXZf7M6M5gBphME14-1739401678-1.2.1.1-RmezCghNUoSSc9kF36DWulviCTaT7aTY7OUFmkJf0RW5vgaiD0jY9qeHnkdwhhK8dIUXPf0R94si7_vRynS5ZP5oqIcQJ7FkY0W58Wu6_GMF1A45XZkHl7N4ChAmvTuQT8c2OTIPhMyTWqw6BlrHezH3PfEbD1EKE3oVuogddOxOtpKU.Y.Uo9TEz2Hnk9HIk_MRAI3cqAz8ChPQzIyUyKfSL0aF_SbTpfUR11KGWgOZaAhAsmTfbDGpNw0t444GU_n1BrqG2jwgTeuYv22DV3O7awYcatXSlq.4kMqzpkrVDxh67M3X2pZPrQpU2v.VaI3nijsVBPXLrC2eyvClXIWywC2GbCCmSZOmqDb4gBQd3JRZTJJoZpLghFXdOs23Egb.ltdbceoQ9zCyjBm12Ij794sp5X_uA5YJthGNWijBTpDXJ9hbaiEJUoAsKyLsLBMH5BEXysUIgu8QbmFSB65ihboY8N7L7d1xt4rzY47n85YiWWxUZAlz41x2oxCV8H8elPLTujKRqDNvxJTjF4zvxJ8qLh10iMhBtM0WYxEV5z1Wj3mJyKwQem1GS2n9HivIk9T9r1P5ptQCyKMwQ64Wl_8lY9rof9p5u3jOyzyOOennQNIml3EsAFcL32e2Ka7rpYQDRN43xvIxAmOLDzQB4u0yUu9EsaWlxXJvCOFYhDTxaHepplibiIKC.Y6F3GWj_x8Ql3eCL08CsuHUjtDertItzcJ7eHxYych6ObljJtuPWSMmdDw2PteiVP62KkAHvTbrTy4GA0Zmsa9Fry3B7tt2c4OiLGPr2wzIwtUE0qXkjJWCVwPCr7Is0Sh.tGxwz_WcCBcwm42OpoB6ZZf4N6.5VydbZnoV31XGi3iRuHe0BXqPN0KXH2bTND1GfoSbT3VcBMkS_.D3Iw6EjLKaTM5w3WdM77dhFmJro9x8NSRSPZxINm3RguzQjqoOeHS3Ga44sbfiVC5B0CJC5TZZe0fK2so6xv4WD_GWRr5ZDX2YQ5hvpM6LTh5uaaLYwbrmW4QWSlrHotyBNKCjyQqmtmuJiQwlSbO6KcYyafddPIQ4aCVMX.DKo7jviK7RNgg6AdRiQPHGAKjOrqhSc3aGrwL2_apH8iD0uHaJq5ESl1Aj_tmh57rzs7b2ztPn1gv9_JZPGdeEaxkWNIwHqbY3HmErfaDzaI4OVRbG2cwmiunJn3qMa5NIWdN22F83xcMZ3tvy08od_jWcYiX9MHb0U7.qq7eMU46W11TXUZi4EVUusmauy1SNBPEJxSkoY5E2.X0MH5_X9qckKOJPoSVfmnJywiLb1qHatqAG4udRKzIS82KFvthxUVvGEgZ4wq5Yu4IFHM2DpRt1BXovdnznVIyixdRK5zh2EyW_OhZWsmPXx9_U_GgCHrPH0FrZRXfu_BPfVtNq4AqLXgvqZfZhdMTWMPom4pYqqctHu_PEW.ZS_YoMeCw3eP8cJCWexWwPZNPXbencZlM3dBJCPhzeAYfNuC5XnayZhP9orpAbKU7Vn1IF9.Fx2.G5X9nJmfaqRx__sonkWSo7NfbMX8WW4FxNgy6.yG0tJ6NZeIoygv4jrmAu2Gkha7Z_sy1PByW8D6XmYqgmaQCpAfmr1c6L5FD.SBjclVd9A6vZaRvoADgNi.wU8KCOqn7pFbUqImurFAl5Bb3SnMpFA4kTC3_GrTkZbX0Wym4E6MDYxCfMcX5LyoklrNJ6Yz0NyNfMUYnCpKGeVrGT0vF9ySG3UBI8ogg13uBpv13.3l.Z0EPRVENk7mvVaXcNdt8tNedge8dLbOiPdTuK.6V0.XQZ2LxKkvFfF.9aH86RNKbsJPFPsGFliXXU0fnsGIjoUk8pHocEF9M_yhS7jjlEuQg2ZRUSzzLp3p5TT10huLrJXwpUH8eBPAqQP2X.eY90Sx_Q9mWUYDqSgq3udr3Dg3JR5QE86yhUaBKZoxemDm3.iIFnM6v03RShU2f6C.wu2QDJOoMTAOpmGpbMaXXz3efIOWrV4bdUP2qcAo9xyoGnUeYY_ltzTBKotOnn_ZtsWzGSf.GQGN6nohJBvRrjFbsQ4MjLLTjD.ykquW9IGNUIk.5mtpgKL5Yi_M2tX6qaxu9DIdO_GQXeDx9rmTlTfvzdbZalmLAMxCfrnJD9PZ_aAr4tQMxCBClrqxwhc88pi4sv37PpZIbAA_v7A.Rqx2Ee5wYG4i9jPCAEViU.J39773NdAXVOPWhPLiWJAOb4KPpc",mdrd: "AwnDiVhOAFUTowWI1h04xOOXN2sRyDn1NecSYEJnf_Y-1739401678-1.2.1.1-Qjd_AkHYNmd5BbLwNIn8jlA0o3PFihcUHkl6g7vPUap1mGjEIOoRNpxKv4dmzTW8ItWUsKs30gaMHgQ1_xECMjWOuSlz6VJgIqgdUeSuOCor_eqj5HyrtSUMm7Mbewm6NBk4vT9HHAtUfnZEtC46uzRSvfW85sAmpYn0jao2xQjQy7Uqmdm5qIdSM57_6VerOyMz8hHWxkrnRukNdKBuEp3ijJDCLH21CLF5drTOEmAkMM7qyOEb1qW1SNEnpz9bUMWdHdqu6aK30Xam9QFRO8QiHnqtKDWpWFvP.OwvDo4tCND17mD8vKeXQ9b75_ugcJR9gKE6Zz67gfhUgXnMOol9JVcIUWUdUZ4VenULlek2S5EDqV7uQZMRiVJyhrw2BVsIhkzK6KVXIV.xUBcer.3n19FKRg12xmT8m5MM8uF5LyIGT3DCB9fjJ9Eseiwnn2jKl1FriINH0vI3Tcw.FqOGWBDOzHIWc7f54hOC2tPszNtYHMfD4DPT26eQiCGR7UqOzOHnvlar_MyboS4wTuC2A1dyKrmBflBVPkEnScEgkk85ySAIWR22NCNfZmkcdacGPrKWWpsEx6YW1KBf07_dFm7eo_hac5RWXketd_kMfbA__zfo_a65nqCoun8GVM8cZCNqDE5avhFA3mpPDxDBNPjD7.IDQivodhc1PbLunw2N_KmghTSIFRpKv2QEn1IIeQHtSPJikwdiCYxb37RUkSBB4f10ObfZ8wJaj.mYqQgQWMoipQlMScOBvi2HFxc3SKhiGa8Y2wSubApFCzkloU75rcpGL1a_FI6w7gC6T.zcStr88hCU9NOi9gkrTn.tDigZfDe7TNzq7PK.scOxF_V3_6lB2.qvmCMUVcK96_dr.E3mFPVwChmES2IlhnzCR3vJdaSqfPsg3KMoWeTyj37mfwcKKRJGMaldPN.DOECApzgdVbgm4cnLaAus1bRkRX27OZOURkjS5GDLCi5EfQJ9OEbTofAeUnkQ4ompwZfat_bHntQC8m_0.P.BT7Pe7SpyNRaUJcyEpppXjxYlbccm1Q0TQFZ7_dH9nUFUEWUZsd3F3ZnLIApf4vO49S.rsoSK7OICQ9xuaxkZNin_9W0Cn2NKW_FKqqSe22E.ffvx7ndzTxgEG9XEbkxa7j6t1xbA53h6xo2XOtLnRzNV9Dj7dXfXcJy5RPJpRBIXnlE6.AT3965owy8Yedhc2UBgICltNPHVmRVtt0c4YIBVrEhyIAkD8.xBuwdoBkcXBCcHgiAenIQQu2vqrzUAn9y.S0vj0wzG6kULXt2xWhq92CnBbGQN0SANY.Lcg2RMOZTDtNQBw1Zl5YUhA5xbEczftqhyxRfTfFP1C2YvxJJ89VcZ49i59ZEzBGOGm92lA4MmGia8xeAg97ROCk_dO92uN2pwq6ekE8cvrsVToxjbcMmce1IpYBFcm1OROZG8r.NU9TAhQv7RjrEOkbxThxZpi6Yp1GApgZcJq53AtzILvMsiBZnrZllAoLt3RenZjoY.lZ0cfBwOsSTqWX5GrR__Q._FlrTvVf9O_DJ1aXFoZgWyjHNayUKDEKq15rPnH7oyJU5DMA0C8oWcoi2hu55gXkY5t_dzZOpzkVd6ExIKsUqtNO1ulSGHJHmTsiKEOL6M.1XGf728UV2.y6hRtfKfEaeduBWlZcQ.8DTAE7.uBiTOSipY48St8r5Dq9t2hDeJWu8W64U5gwPX8upXut8lx0hVARdei2bvJ6VdkDPHIGsK81NI6WzB1FduQ7J8Xh.7PRoNrPoFtHaWhelkRsBMNicAge71MpZZh6ukz7DOWcuY7DSyRwff7ZPAniQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91103cea28878293';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\/1572496038?__cf_chl_rt_tk=MUgKHzdmCSYZhk3wnFlZXCcu84W7VigQLHfpB5t6DGc-1739401678-1.0.1.1-oPmrMzrtxEazAt6QBk7KOp_xXUmTphYcv8XanMf6owE" + 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