關於 content length 304 ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. HTTP/1.1: Status Code Definitions

If a Content-Length header field is present in the response, ... The 304 response MUST NOT contain a message-body, and thus is always terminated by the ...

#12. ngx_lua, 当code=304时,总是带Content-Length

Hello! 2012/12/27 Wendal Chen: > > test.lua > > ngx.exit(ngx.HTTP_NOT_MODIFIED) > > curl -v 能够看到: > > Content-Length: 0 > > 但http标准里面, 304是不 ...

#13. HTTP_ConditionalGet : Last-Modified is known

Last-Modified is known : add Content-Length ... all 200 responses are sent in chunks a second apart, so you should notice that 304 responses are quicker.

#14. Content-Length - HTTP header explained

The Content-Length header is sent as part of a HTTP response to indicate the number of bytes long the message body is. It can be used by the ...

#15. Cache-Control header not included in 304 responses

HTTP/1.1 304 The condition specified using HTTP conditional header(s) is not met. Content-Length: 0 Server: Windows-Azure-Blob/1.0 ...

#16. Request and response behavior for custom origins

CloudFront replaces this header with Connection: Keep-Alive before forwarding the request to your origin. No. Content-Length. CloudFront forwards the header to ...

#17. GZip Middleware Throws "Response content longer than ...

GZip Middleware Throws "Response content longer than Content-Length" when given a 304 empty-body response. See original GitHub issue ...

#18. 304 Not Modified issue - php

@Hafthor - actually it's perfectly fine (if a little stupid) to send a positive content-length with a 304 as the response "is always terminated by the first ...

#19. [squid-users] My cache gived me a content-length of 0, and ...

Ok - I understand why the content-length is 0 as the server responded with a 304. Gotcha. Squid in response responds with a 200.

#20. The $body_bytes_sent variable should be equal to Content ...

Suppose the server response to a request always has a the Content-Length header and is not split into chunks. Then $body_bytes_sent will be ...

#21. List of HTTP header fields

Content-Encoding, The type of encoding used on the data. See HTTP compression. Content-Encoding: gzip ; Content-Length, The length of the request body in octets ...

#22. HTTP协议中Content-Length的详细解读转载

Content -Length用于描述HTTP消息实体的传输长度the transfer-length of the ... 响应为1xx，204，304相应或者head请求，则直接忽视掉消息实体内容。

#23. 遇到Content-Length不正確到底發生什麼情況

注意這邊的Content-Length 都先只request header 裡面不是只response ... 響應為1xx，204，304 相應或者head 請求，則直接忽視掉消息實體內容。

#24. HTTP Chunked Encoding

9.3 Implied Content Length. Some types of responses, such as 304, are defined to never have content and therefore the client can assume that the response ...

#25. View as plain text

{ "HTTP/1.0 200 OK\r\n" + "Content-Length: 10\r\n" + "Connection: close\r\n" + ... multiple content-length headers for 204 and 304 should still be checked ...

#26. HTTP/HTTPS protocol constraints

Content Length. Specifies the maximum acceptable length in bytes of the request body. · Illegal Content Length · Header Length · Header Name Length · Header Value ...

#27. Content-Length in HEAD requests through workers

According to RFC the Content-Length header should be the the same as when doing a GET request. ... I assume the likely cause is a 304.

#28. RFC 9110 - HTTP Semantics

A server MAY send a Content-Length header field in a 304 (Not Modified) response to a conditional GET request (Section 15.4.5); a server MUST NOT send ...

#29. http如何定義一次完整的request與response - YJ Blog

Request為HEAD一律不回傳Entity Body; 狀態碼為1XX/204/304一律不回傳; 其餘Response夾帶或回傳"Content-Length: 0"表示不夾帶 ...

#30. 無題

Some types of responses, such as 304, are defined to never have content and ... 9.4 Chunked … tf1 direct live direct http header content-length example mean ...

#31. Content-Length - HTTP | MDN

The Content-Length entity header is indicating the size of the entity-body, in decimal number of octets, sent to the recipient.

#32. HTTP Model

The content length is unknown and the individual chunks are presented as a ... 204 (No Content), or 304 (Not Modified) status code is always terminated by ...

#33. HTTP Response Status Codes Explained

If a Content-Length header field is present in the response, ... If a cache uses a received 304 response to update a cache entry, ...

#34. Caching overview | Cloud CDN

For example, a Content-Length header that correctly matches the size of the ... validate the existing cache entry by sending a 304 Not Modified response.

#35. HTTP headers 簡介: 一些常用的headers

Connection: Keep-Alive Content-Length: 10000 Content-Type: text/html ... 就代表client擁有的資料的copy還是最新的，就回傳304 Not Modified。

#36. Source code for tornado.http1connection

_request_start_line.method == "HEAD" ): skip_body = True code = start_line.code if code == 304: # 304 responses may include the content-length header # but ...

#37. RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1

The HTTP protocol does not place any a priori limit on the length of a URI. ... All 1xx (informational), 204 (no content), and 304 (not modified) responses ...

#38. Caching Header Best Practices

Content -Length: 100000 ETag: "a-NEW-unique-hash-generated-by-the-server". This approach is valuable, but does have drawbacks:.

#39. HTTP details

The Content Delivery API and Preview API are fully available via SSL. ... If the content hasn't changed in the meantime the API will respond with a 304 Not ...

#40. HTTP Response Headers

... Content-Type: image/png < Content-Length: 102860 < Server: Jetty(6.1.8) ... GeoWebCache will return a 304 status code indicating that the resource was ...

#41. Custom response header not working because of Content ...

When there is no content-length in response [ex: status code 304], my custom header is coming out nicely. Is there a way to not use fixed content lengths or ...

#42. Responses

headers - A dictionary of strings. media_type - A string giving the media type. eg. "text/html". Starlette will automatically include a Content-Length header ...

#43. 用curl trace 指令查詢HTTP request & response 的封包byte ...

0000: 63 6f 6e 74 65 6e 74 2d 6c 65 6e 67 74 68 3a 20 content-length: 0010: 34 31 0d 0a 41. ... (304) (IN), TLS handshake, Server hello (2):

#44. Ben's web programming pages: HTTP headers

If it is still current, the server sends only the response "304 Not Modified" ... The "Content-Length" header is basically a way of being kind to browsers.

#45. Content-length http response header

WebSet Content-Length header to limit the response body size. ... the following HTTP response occurs: HTTP/1.0 304 Not Modified Connection: Close ...

#46. Jersey service with Status code 304 produces nasty ...

When I set the 304 status code on the response I always get this exception: ... I think it's down to the conenction:close and the content-length header not ...

#47. Setting Cache control headers for common content types ...

Setting Cache control headers for common content types Nginx and Apache ... max-age=2592000 Server: gws Content-Length: 220 X-XSS-Protection: 0 ...

#48. Doing HTTP Caching Right: Introducing httplib2

HTTP/1.1 304 Not Modified Content-Length: 647 Server: Apache Connection: close Date: Mon, 23 Jan 2006 16:10:52 GMT Content-Type: text/html; ...

#49. 411 LENGTH REQUIRED HTTP Status Code

411 LENGTH REQUIRED: The server refuses to accept the request without a defined Content-Length.The client MAY repeat the request if it adds a valid Content.

#50. io.netty.handler.codec.http.HttpObjectDecoder

If the content length 60 * (or the length of each chunk) exceeds this value, the content ... 3.3.3</a> states that if a 304 * request does not have either a ...

#51. Adv CSS/JS Agg - If-Modified-Since warning but 304 is ...

The server should have responded with a 304, instead a 200 was ... Server Response HTTP/1.1 304 Not Modified ... Content-Length: 178

#52. 174301 - content-*, x-webkit-*, x-content-* HTTP headers ...

Issue 174301: content-*, x-webkit-*, x-content-* HTTP headers from 304 responses ... I can see the reason for example for "Content-Length" or "Content-Type" ...

#53. HTTP servers — Python 3.11.4 documentation

Changed in version 3.4: The error response includes a Content-Length header. ... was not modified after this time, a 304 , 'Not Modified' response is sent.

#54. Is the Content-Length header required for a HTTP/1.0 ...

... and 1xx, 204 or 304 responses, should not include an entity body, and therefore need not include a Content-Length header; and.

#55. 为什么http请求的content-length为0 实体是有内容的

Content -Length用于描述HTTP消息实体的传输长度the transfer-length of the ... 以下几个规则： 响应为1xx，204，304相应或者head请求，则直接忽视掉消息实体内容。

#56. Class Response | CakePHP 3.6

Sets the response body to an empty text if the status code is 204 or 304 ... Sets the Content-Length header for the response If called with no arguments ...

#57. HTTP 狀態碼(Status Codes)

303 (See Other) — 參閱其他; 304 (Not Modified) — 未修改 ... Content-Length: 26012 Content-Type: image/gif ...26012 bytes of partial image ...

#58. HTTP conditional requests in PHP - Alexandre Alapetite

Content -Length: 3495: If the length of the document is known ... //If the conditional request allows to use the client's cache $is304=true; ...

#59. 1226070 – 304 HTTP response with ETag doesn't include ...

Bug 1226070 - 304 HTTP response with ETag doesn't include CORS headers ... DELETE, OPTIONS Content-Type: text/html; charset=utf-8 Content-Length: 21 Date: ...

#60. HTTP | Node.js v20.3.1 Documentation

Set Content-Length header to limit the response body size. ... attempt is made to write to the body for a HEAD request or as part of a 204 or 304 response, ...

#61. Http status 狀態404 304 - Puritys Blog

403 沒有權限讀取，可能是IP 被阻檔或是伺服器限制。 404 伺服器未找到目標網址，檔案不存在。 408 Client Request timeout; 411 沒有指定content-length ...

#62. How do I download a file over http without a content length ...

First of all read about HTTP and fix your server (hint: add content length or read how "Transfer-Encoding: chunked" is working, just this header is not enough), ...

#63. upload.wikimedia.org HTTP 304 responses lack a Content- ...

... Oct 2020 21:14:44 GMT content-type: image/jpeg content-length: 70536 last-modified: Wed, 11 Sep 2019 03:32:21 GMT etag: 6ea8427bb3c0df7b880989b9022f5428 ...

#64. 304로 응답하면 Content-Length는 0이 돼야 하지 않을까요?

Content -Length는 HTTP Message Body의 데이터 크기의 바이트 수를 명시하는 헤더입니다.해당 강의 6:55 쯤에 나오는 자료에 보면, response message ...

#65. 使用curl的GET请求。没有错误，但是Content-Length等于0

Simple GET request with curl returns empty body (Content-Length: 0): ... 如果没有任何变化，这将导致服务器返回一个空的304响应。只要把它抽出来就可以了。

#66. How to check if responses are gzipped

For example, this is a compressed object, notice the Content-Encoding header and the object size. >curl -I http://edition.cnn.com/ --compressed

#67. HTTP Cache Headers - A Complete Guide

CDN caches are distributed caches that are used by Content Delivery ... if the assets have changed (304 response if nothing has changed).

#68. Bug #1002: 304 (not modified) must have no Content-Length

According to RFC 2616 (section 4.3), these responses MUST NOT include a message body: 1xx, 204, 304. This means they should not have a Content-Length.

#69. PHP readfile() with 304 Not Modified and HTTP 206 Partial ...

... if ($mtime <= $ifModifiedSince) { http_response_code(304); return; } ... $_SERVER['HTTP_RANGE']); } // output range headers unless size ...

#70. HTTP Status Codes: All 63 explained

But what about a 103 Early Hints, 205 Reset Content and 305 Use Proxy? ... The 304 Not Modified response code informs the client that the response has not ...

#71. Responses | Strapi Documentation

length. Return response Content-Length as a number when present, or deduce from ctx.body when possible, or undefined .

#72. 411 Length Required

Most HTTP requests that have a request body, will also have a Content-Length header indicating how big the body will be.

#73. How To Implement Browser Caching with Nginx's header ...

When websites are full of images and interactive content run by ... HTTP/1.1 304 Not Modified Server: nginx/1.18.0 (Ubuntu) Date: Tue, ...

#74. HTTP Header 参数详解

Cookie: $Version=1; Skin=new; Content-Length 请求的内容 ... 如果内容未改变返回304代码，参数为服务器先前发送的Etag，与服务器回应的Etag比较 ...

#75. HTTP_ConditionalGet : Last-Modified is unknown

Last-Modified is unknown : use hash of content for ETag ... are sent in chunks a second apart, so you should notice that 304 responses are quicker.

#76. Why does Firefox ignore the `304 Not Modified` status sent ...

Why does Firefox ignore the `304 Not Modified` status sent by the webserver ... gzip Content-Length: 22700 Content-Type: text/css Date: Fri, ...

#77. Problem with 304 Not Modified responses on Wild...

Note that the request actually ends and cURL returns to the command line, but also there's Content-Length: 0 instead of Transfer-Encoding: ...

#78. PUT and content-length with tamino webdav - webMethods

When I do a PUT to the server with the content-length header set, it … ... 204, and 304 responses and any response to a HEAD request) is ...

#79. HTTP 304 Not Modified - An Introduction

An introduction to the HTTP 304 cache mechanism. ... 18 Sep 2015 22:19:01 GMT Content-Type: image/png Content-Length: 1393216 Last-Modified: ...

#80. Apigee responds with 504 error for backend response 304

Are there content-length / transfer encoding headers on the target server response?

#81. HTTP Status Codes for REST API

204 No Content - Response doesn't have a payload. ... Interestingly 304 is considered a redirect because the server is redirecting the ...

#82. HTTP headers | Content-Length

HTTP Content-Length entity-header is used to indicate the size of entity-body in decimal no of octets i.e. bytes and sent it to the ...

#83. dio | Dart Package

Note: content-length must be set if you want to subscribe to the sending ... of 2xx and is also not 304. if (e.response != null) { print(e.response.data) ...

#84. HTTP - Entêtes - Content-Length

Un serveur peut envoyer un champ d'entête Content-Length: dans une réponse 304 Not Modified à une requête GET conditionnelle; un serveur ne doit ...

#85. ASP.NET MVC 304 Not Modified Filter for Syndication ...

StatusCode = 304; response.StatusDescription = "Not Modified"; // Explicitly set the Content-Length header so the client doesn't wait for ...

#86. HTTP Header 中的黑科技 - DTeam 技术日志

HTTP/1.1 200 OK Content-Length: 0 Connection: keep-alive ... 因此本地时间不同步时不影响缓存效果; 资源未过期服务端应该返回 304 Not Modified.

#87. Firefox/weblogic bug where 304 response followed ...

2. web-server responds with 304 and then empty content packet. ... 20 Dec 2006 06:24:02 GMT\r\nContent-Length: "); String content ...

#88. Servlet Tutorial: Reading HTTP Request Headers

To do this, it needs to send a Content-Length header in the response, ... otherwise send a 304 "Not Modified" response); Pragma (the no-cache value ...

#89. HTTP協議頭部與Keep-Alive模式詳解

任何不含有消息體的消息（如1XXX、204、304等響應消息和任何頭(HEAD，首部)請求的響應 ... 如果出現了Content-Length頭字段，它的值表示entity-length（實體長度） ...

#90. CURLFile POST missing Content-Length header

CURLFile POST missing Content-Length header. Bug #1887826 reported by Stephen Rees on ... Stephen Rees (srees304) wrote on 2020-07-21 : #4 ...

#91. The HTTP Protocol

GET /index.html HTTP/1.0 Accept: text/html Accept: image/gif User-Agent: Lynx/2.4 ... bytes Content-Length: 382 Connection: close Content-Type: text/html <!

#92. SOAP Content Length

I assume it's because I may not be specifying the content length in the header. I can see from a coworker he's coding the length of this data string in ...

#93. HTTP Basics Fill in the blank below: (Example)

HTTP/1.1 304 Not Modified Server: nginx/1.9.4 Date: Thu, 17 Mar 2016 23:25:42 GMT Content-Type: text/html; charset=utf-8 Content-Length: ...

#94. Attacks Description - Action Policy | Barracuda Campus

123, Malformed Content Length, MALFORMED_CONTENT_LEN, Content-Length request header ... 304, Object Depth Exceeded, JSON_MAX_OBJECT_DEPTH ...

#95. 【转载】http 响应头里没有或者有content-length 的几种可能性

响应为1xx，204，304相应或者head请求，则直接忽视掉消息实体内容。 如果有Transfer-Encoding，则优先采用Transfer-Encoding里面的方法来找到对应的长度。比如说Chunked ...

#96. Response Code Details

A request was sent with both Transfer-Encoding: chunked and a Content-Length header when disallowed by configuration. http1.content_length_not_allowed.

#97. HTTP Response Codes Flashcards

206 Partial Content ... 304 Not Modified ... Server rejected the request because the Content-Length header field is not defined and the server requires it.