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  1. 開発者向けのウェブ技術
  2. HTTP
  3. HTTP ヘッダー
  4. NEL
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Table of contents

  • 構文
  • 仕様書
  • 関連情報

NEL

HTTP の NEL レスポンスヘッダーは、ネットワークリクエストログ記録を構成するために使用されます。

ヘッダー種別 レスポンスヘッダー
禁止ヘッダー名 いいえ

構文

NEL: { "report_to": "name_of_reporting_group", "max_age": 12345, "include_subdomains": false, "success_fraction": 0.0, "failure_fraction": 1.0 }

仕様書

仕様書
Network Error Logging

関連情報

  • Network Error Logging (NEL) の説明

Last modified: Apr 30, 2020, by MDN contributors

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Related Topics

  1. HTTP
  2. Guides:
  3. Resources and URIs
    1. Identifying resources on the Web
    2. Data URIs
    3. Introduction to MIME Types
    4. Complete list of MIME Types
    5. Choosing between www and non-www URLs
  4. HTTP guide
    1. Basics of HTTP
    2. Overview of HTTP
    3. Evolution of HTTP
    4. HTTP Messages
    5. A typical HTTP session
    6. Connection management in HTTP/1.x
    7. Protocol upgrade mechanism
  5. HTTP security
    1. Content Security Policy (CSP)
    2. HTTP Public Key Pinning (HPKP)
    3. HTTP Strict Transport Security (HSTS)
    4. Cookie security
    5. X-Content-Type-Options
    6. X-Frame-Options
    7. X-XSS-Protection
    8. Mozilla web security guidelines
    9. Mozilla Observatory
  6. HTTP access control (CORS)
  7. HTTP authentication
  8. HTTP caching
  9. HTTP compression
  10. HTTP conditional requests
  11. HTTP content negotiation
  12. HTTP cookies
  13. HTTP range requests
  14. HTTP redirects
  15. HTTP specifications
  16. Feature policy
  17. References:
  18. HTTP headers
    1. Accept-CH-Lifetime
    2. Accept-CH
    3. Accept-Charset
    4. Accept-Encoding
    5. Accept-Language
    6. Accept-Patch
    7. Accept-Post
    8. Accept-Ranges
    9. Accept
    10. Access-Control-Allow-Credentials
    11. Access-Control-Allow-Headers
    12. Access-Control-Allow-Methods
    13. Access-Control-Allow-Origin
    14. Access-Control-Expose-Headers
    15. Access-Control-Max-Age
    16. Access-Control-Request-Headers
    17. Access-Control-Request-Method
    18. Age
    19. Allow
    20. Alt-Svc
    21. Authorization
    22. Cache-Control
    23. Clear-Site-Data
    24. Connection
    25. Content-Disposition
    26. Content-Encoding
    27. Content-Language
    28. Content-Length
    29. Content-Location
    30. Content-Range
    31. Content-Security-Policy-Report-Only
    32. Content-Security-Policy
    33. Content-Type
    34. Cookie
    35. これは廃止された API であり、動作は保証されていません。 Cookie2
    36. Cross-Origin-Embedder-Policy
    37. Cross-Origin-Opener-Policy
    38. Cross-Origin-Resource-Policy
    39. Date
    40. Device-Memory
    41. Digest
    42. DNT
    43. この API は標準化されていません。 これは廃止された API であり、動作は保証されていません。 DPR
    44. Early-Data
    45. ETag
    46. Expect-CT
    47. Expect
    48. Expires
    49. これは実験段階の API です。製品内のコードで使用しないようご注意ください。 Feature-Policy
    50. Forwarded
    51. From
    52. Host
    53. If-Match
    54. If-Modified-Since
    55. If-None-Match
    56. If-Range
    57. If-Unmodified-Since
    58. Index
    59. Keep-Alive
    60. この API は標準化されていません。 Large-Allocation
    61. Last-Modified
    62. Link
    63. Location
    64. NEL
    65. Origin
    66. これは非推奨の API です。まだ動作しているかもしれませんが、もう使用するべきではありません。 Pragma
    67. Proxy-Authenticate
    68. Proxy-Authorization
    69. これは非推奨の API です。まだ動作しているかもしれませんが、もう使用するべきではありません。 これは廃止された API であり、動作は保証されていません。 Public-Key-Pins-Report-Only
    70. これは非推奨の API です。まだ動作しているかもしれませんが、もう使用するべきではありません。 これは廃止された API であり、動作は保証されていません。 Public-Key-Pins
    71. Range
    72. Referer
    73. Referrer-Policy
    74. Retry-After
    75. Save-Data
    76. Sec-Fetch-Dest
    77. Sec-Fetch-Mode
    78. Sec-Fetch-Site
    79. Sec-Fetch-User
    80. Sec-WebSocket-Accept
    81. Server-Timing
    82. Server
    83. Set-Cookie
    84. これは廃止された API であり、動作は保証されていません。 Set-Cookie2
    85. SourceMap
    86. Strict-Transport-Security
    87. TE
    88. Timing-Allow-Origin
    89. Tk
    90. Trailer
    91. Transfer-Encoding
    92. Upgrade-Insecure-Requests
    93. Upgrade
    94. User-Agent
    95. Vary
    96. Via
    97. Want-Digest
    98. Warning
    99. WWW-Authenticate
    100. X-Content-Type-Options
    101. X-DNS-Prefetch-Control
    102. この API は標準化されていません。 X-Forwarded-For
    103. この API は標準化されていません。 X-Forwarded-Host
    104. この API は標準化されていません。 X-Forwarded-Proto
    105. X-Frame-Options
    106. X-XSS-Protection
  19. HTTP request methods
    1. CONNECT
    2. DELETE
    3. GET
    4. HEAD
    5. OPTIONS
    6. PATCH
    7. POST
    8. PUT
    9. TRACE
  20. HTTP response status codes
    1. 100 Continue
    2. 101 Switching Protocols
    3. 103 Early Hints
    4. 200 OK
    5. 201 Created
    6. 202 Accepted
    7. 203 Non-Authoritative Information
    8. 204 No Content
    9. 205 Reset Content
    10. 206 Partial Content
    11. 300 Multiple Choices
    12. 301 Moved Permanently
    13. 302 Found
    14. 303 See Other
    15. 304 Not Modified
    16. 307 Temporary Redirect
    17. 308 Permanent Redirect
    18. 400 Bad Request
    19. 401 Unauthorized
    20. 402 Payment Required
    21. 403 Forbidden
    22. 404 Not Found
    23. 405 Method Not Allowed
    24. 406 Not Acceptable
    25. 407 Proxy Authentication Required
    26. 408 Request Timeout
    27. 409 Conflict
    28. 410 Gone
    29. 411 Length Required
    30. 412 Precondition Failed
    31. 413 Payload Too Large
    32. 414 URI Too Long
    33. 415 Unsupported Media Type
    34. 416 Range Not Satisfiable
    35. 417 Expectation Failed
    36. 418 I'm a teapot
    37. 422 Unprocessable Entity
    38. 425 Too Early
    39. 426 Upgrade Required
    40. 428 Precondition Required
    41. 429 Too Many Requests
    42. 431 Request Header Fields Too Large
    43. 451 Unavailable For Legal Reasons
    44. 500 Internal Server Error
    45. 501 Not Implemented
    46. 502 Bad Gateway
    47. 503 Service Unavailable
    48. 504 Gateway Timeout
    49. 505 HTTP Version Not Supported
    50. 506 Variant Also Negotiates
    51. 507 Insufficient Storage
    52. 508 Loop Detected
    53. 510 Not Extended
    54. 511 Network Authentication Required
  21. CSP directives
    1. CSP: base-uri
    2. CSP: block-all-mixed-content
    3. CSP: child-src
    4. CSP: connect-src
    5. CSP: default-src
    6. CSP: font-src
    7. CSP: form-action
    8. CSP: frame-ancestors
    9. CSP: frame-src
    10. CSP: img-src
    11. CSP: manifest-src
    12. CSP: media-src
    13. CSP: navigate-to
    14. CSP: object-src
    15. CSP: plugin-types
    16. CSP: prefetch-src
    17. これは廃止された API であり、動作は保証されていません。 CSP: referrer
    18. CSP: report-to
    19. CSP: report-uri
    20. CSP: require-sri-for
    21. CSP: require-trusted-types-for
    22. CSP: sandbox
    23. CSP: script-src-attr
    24. CSP: script-src-elem
    25. CSP: script-src
    26. CSP: style-src-attr
    27. CSP: style-src-elem
    28. CSP: style-src
    29. CSP: trusted-types
    30. CSP: upgrade-insecure-requests
    31. CSP: worker-src
  22. CORS errors
    1. Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'
    2. Reason: CORS request did not succeed
    3. Reason: CORS disabled
    4. Reason: CORS request external redirect not allowed
    5. Reason: invalid token ‘xyz’ in CORS header ‘Access-Control-Allow-Headers’
    6. Reason: invalid token ‘xyz’ in CORS header ‘Access-Control-Allow-Methods’
    7. Reason: Did not find method in CORS header ‘Access-Control-Allow-Methods’
    8. Reason: expected ‘true’ in CORS header ‘Access-Control-Allow-Credentials’
    9. Reason: missing token ‘xyz’ in CORS header ‘Access-Control-Allow-Headers’ from CORS preflight channel
    10. Reason: CORS header 'Access-Control-Allow-Origin' missing
    11. Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed
    12. Reason: Credential is not supported if the CORS header ‘Access-Control-Allow-Origin’ is ‘*’
    13. Reason: CORS header ‘Origin’ cannot be added
    14. Reason: CORS preflight channel did not succeed
    15. Reason: CORS request not HTTP
  23. Feature-Policy directives
    1. Feature-Policy: accelerometer
    2. Feature-Policy: ambient-light-sensor
    3. Feature-Policy: autoplay
    4. Feature-Policy: battery
    5. Feature-Policy: camera
    6. Feature-Policy: display-capture
    7. これは実験段階の API です。製品内のコードで使用しないようご注意ください。 Feature-Policy: document-domain
    8. Feature-Policy: encrypted-media
    9. Feature-Policy: fullscreen
    10. Feature-Policy: geolocation
    11. Feature-Policy: gyroscope
    12. Feature-Policy: layout-animations
    13. Feature-Policy: legacy-image-formats
    14. Feature-Policy: magnetometer
    15. Feature-Policy: microphone
    16. Feature-Policy: midi
    17. Feature-Policy: oversized-images
    18. Feature-Policy: payment
    19. Feature-Policy: picture-in-picture
    20. Feature-Policy: publickey-credentials-get
    21. Feature-Policy: screen-wake-lock
    22. Feature-Policy: sync-xhr
    23. Feature-Policy: unoptimized-images
    24. Feature-Policy: unsized-media
    25. Feature-Policy: usb
    26. Feature-Policy: vibrate
    27. Feature-Policy: vr
    28. Feature-Policy: wake-lock
    29. web-share
    30. Feature-Policy: xr-spatial-tracking
    31. Feature-Policy: xr
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