[Outdated] [Bug] Repository deep link returned JSON

[MasterInQuestion]

    E.g. https://github.com/MasterInQuestion/Markup/blob/main/.github/README.txt
    Would return below JSON:
[[

{
  "payload": {
    "allShortcutsEnabled": false,
    "fileTree": {
      ".github": {
        "items": [
          {
            "name": "README.txt",
            "path": ".github/README.txt",
            "contentType": "file"
          }
        ],
        "totalCount": 1
      },
      "": {
        "items": [
          {
            "name": ".github",
            "path": ".github",
            "contentType": "directory"
          },
          {
            "name": "!clock.htm",
            "path": "!clock.htm",
            "contentType": "file"
          },
          {
            "name": "AAA.htm",
            "path": "AAA.htm",
            "contentType": "file"
          },
          {
            "name": "Counting.htm",
            "path": "Counting.htm",
            "contentType": "file"
          },
          {
            "name": "Markup Intro.htm",
            "path": "Markup Intro.htm",
            "contentType": "file"
          },
          {
            "name": "Structure.htm",
            "path": "Structure.htm",
            "contentType": "file"
          },
          {
            "name": "Verbose--.htm",
            "path": "Verbose--.htm",
            "contentType": "file"
          },
          {
            "name": "Verbose-.htm",
            "path": "Verbose-.htm",
            "contentType": "file"
          },
          {
            "name": "Verbose.htm",
            "path": "Verbose.htm",
            "contentType": "file"
          }
        ],
        "totalCount": 9
      }
    },
    "fileTreeProcessingTime": 6.154761,
    "foldersToFetch": [],
    "reducedMotionEnabled": null,
    "repo": {
      "id": 529737224,
      "defaultBranch": "main",
      "name": "Markup",
      "ownerLogin": "MasterInQuestion",
      "currentUserCanPush": false,
      "isFork": false,
      "isEmpty": false,
      "createdAt": "2022-08-28T01:47:42.000Z",
      "ownerAvatar": "https://avatars.githubusercontent.com/u/81106051?v=4",
      "public": true,
      "private": false,
      "isOrgOwned": false
    },
    "symbolsExpanded": false,
    "treeExpanded": true,
    "refInfo": {
      "name": "main",
      "listCacheKey": "v0:1683789662.0",
      "canEdit": false,
      "refType": "branch",
      "currentOid": "27e162211ec1b9ae2a661a73c42b8a954ff2943e"
    },
    "path": ".github/README.txt",
    "currentUser": null,
    "blob": {
      "rawLines": [
        "\tFor discussions: [ https://github.com/MasterInQuestion/talk/discussions ].\r"
      ],
      "stylingDirectives": [
        []
      ],
      "csv": null,
      "csvError": null,
      "dependabotInfo": {
        "showConfigurationBanner": false,
        "configFilePath": null,
        "networkDependabotPath": "/MasterInQuestion/Markup/network/updates",
        "dismissConfigurationNoticePath": "/settings/dismiss-notice/dependabot_configuration_notice",
        "configurationNoticeDismissed": null,
        "repoAlertsPath": "/MasterInQuestion/Markup/security/dependabot",
        "repoSecurityAndAnalysisPath": "/MasterInQuestion/Markup/settings/security_analysis",
        "repoOwnerIsOrg": false,
        "currentUserCanAdminRepo": false
      },
      "displayName": "README.txt",
      "displayUrl": "https://github.com/MasterInQuestion/Markup/blob/main/.github/README.txt?raw=true",
      "headerInfo": {
        "blobSize": "77 Bytes",
        "deleteInfo": {
          "deleteTooltip": "You must be signed in to make or propose changes"
        },
        "editInfo": {
          "editTooltip": "You must be signed in to make or propose changes"
        },
        "ghDesktopPath": "https://desktop.github.com",
        "gitLfsPath": null,
        "onBranch": true,
        "shortPath": "fde95d9",
        "siteNavLoginPath": "/login?return_to=https%3A%2F%2Fgithub.com%2FMasterInQuestion%2FMarkup%2Fblob%2Fmain%2F.github%2FREADME.txt",
        "isCSV": false,
        "isRichtext": false,
        "toc": null,
        "lineInfo": {
          "truncatedLoc": "1",
          "truncatedSloc": "1"
        },
        "mode": "file"
      },
      "image": false,
      "isCodeownersFile": null,
      "isPlain": false,
      "isValidLegacyIssueTemplate": false,
      "issueTemplateHelpUrl": "https://docs.github.com/articles/about-issue-and-pull-request-templates",
      "issueTemplate": null,
      "discussionTemplate": null,
      "language": "Text",
      "languageID": 372,
      "large": false,
      "loggedIn": false,
      "newDiscussionPath": "/MasterInQuestion/Markup/discussions/new",
      "newIssuePath": "/MasterInQuestion/Markup/issues/new",
      "planSupportInfo": {
        "repoIsFork": null,
        "repoOwnedByCurrentUser": null,
        "requestFullPath": "/MasterInQuestion/Markup/blob/main/.github/README.txt",
        "showFreeOrgGatedFeatureMessage": null,
        "showPlanSupportBanner": null,
        "upgradeDataAttributes": null,
        "upgradePath": null
      },
      "publishBannersInfo": {
        "dismissActionNoticePath": "/settings/dismiss-notice/publish_action_from_dockerfile",
        "dismissStackNoticePath": "/settings/dismiss-notice/publish_stack_from_file",
        "releasePath": "/MasterInQuestion/Markup/releases/new?marketplace=true",
        "showPublishActionBanner": false,
        "showPublishStackBanner": false
      },
      "rawBlobUrl": "https://github.com/MasterInQuestion/Markup/raw/main/.github/README.txt",
      "renderImageOrRaw": false,
      "richText": null,
      "renderedFileInfo": null,
      "shortPath": null,
      "tabSize": 8,
      "topBannersInfo": {
        "overridingGlobalFundingFile": false,
        "globalPreferredFundingPath": null,
        "repoOwner": "MasterInQuestion",
        "repoName": "Markup",
        "showInvalidCitationWarning": false,
        "citationHelpUrl": "https://docs.github.com/en/github/creating-cloning-and-archiving-repositories/creating-a-repository-on-github/about-citation-files",
        "showDependabotConfigurationBanner": false,
        "actionsOnboardingTip": null
      },
      "truncated": false,
      "viewable": true,
      "workflowRedirectUrl": null,
      "symbols": {
        "timedOut": false,
        "notAnalyzed": true,
        "symbols": []
      }
    },
    "copilotInfo": null,
    "copilotAccessAllowed": false,
    "csrf_tokens": {
      "/MasterInQuestion/Markup/branches": {
        "post": "UZvJOXkgotEuKvVbQw-JMBAxspg4ESRasnln9Gu6BFscMg-D-Kh9BMAxtH03rLopGd9CRpwGcmyGQCQ9ZwJ3dA"
      },
      "/repos/preferences": {
        "post": "eH9FgDjzOoydTuTC2uMlvDXXE5BZFjWQLgn2wrd19HtskHz9yfN_h2aNcg48G4fQYCa4OKE1LDFoQtHF5eBjVw"
      }
    }
  },
  "title": "Markup/.github/README.txt at main · MasterInQuestion/Markup"
}

]]
(formatted); instead of HTML.

    Request header:
[[

GET /MasterInQuestion/Markup/blob/main/.github/README.txt HTTP/2.0
host: github.com
user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0
accept: */*
accept-language: en
accept-encoding: gzip, deflate, br
upgrade-insecure-requests: 1
sec-fetch-dest: document
sec-fetch-mode: navigate
sec-fetch-site: cross-site
te: trailers

]]

    Primarily affects ~~Firefox~~ custom browsers.

    Modifying the Accept header to `,*/*` (or `text/html,*/*` alike) works around the problem.
    Seems the back-end has incorrect assumption on Accept.

    See also: https://github.com/orgs/community/discussions/54546#discussioncomment-7474975

[MasterInQuestion]

    Does GitHub's page loading rely on the default `*/*` of Fetch/XHR?
    https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/setRequestHeader
    https://fetch.spec.whatwg.org/#ref-for-header-list-contains⑧

    ----

    Example no more reproducible now.
    Whether sending browser-like UA or not, or not at all.

[MasterInQuestion]

    The "/search" page exhibited identical problem.
    Not yet fixed.

    E.g. https://github.com/search?q=involves:MasterInQuestion&type=discussions&s=updated&o=desc
    Also: https://github.com/search?type=code&q=repo:curl/curl+/(?-i)(?:%5CW|^)curl_global_trace(?:%5CW|%24)/

    Same issue also on:
    https://github.com/settings/notifications (login required)

    And: https://github.com/orgs/community/discussions/139005#discussioncomment-10713581

[MasterInQuestion]

    All listed examples no more reproducible.

[MasterInQuestion]

    Probably similar:
    I've noted some interfaces strangely demanded the presence of "X-Requested-With: XMLHttpRequest" header to give access: Not really sensible.
    E.g. https://github.com/user_content_edits/UCE_lAbOEfmk4M4AoquGzgBDRok

    Probably doesn't merit a separate topic.


    "Must be requested with X-Requested-With: XMLHttpRequest"..?
    https://github.com/orgs/community/discussions/25505