Analyze HTTP Header
This tool will get the HTTP header of the specified url. Some elements of analysis of the header are given to facilitate the reading.
Details on the HTTP header fields you may find
| Field | Description | Example |
|---|---|---|
| Access-Control-Allow-Origin | Specifies which websites are able to access the ressources. If there is none, the server should return *. |
Access-Control-Allow-Origin: * |
| Accept-Patch | Gives the patch document formats accepted by the server. It implicitly indicates that PATCH is available on the Request-URI resource. | Accept-Patch: text/example;charset=utf-8 |
| Accept-Ranges | Specifies the range requests accepted for a resource. Though the value is often bytes. none would indicate to the client not to try a range request. |
Accept-Ranges: bytes |
| Age | Estimates the number of seconds since the answer was created by the server. The max value is 2147483648. | Age: 8 |
| Allow | Defines a list of methods supported by the server. The client can try another but the server probably won't respond to it. | Allow: PUT, HEAD, GET |
| Cache-Control | Specifies often the duration a resource can be keep by the user agent without being requested again to the server. It is used to reduce the bandwith usage and loading time. | Cache-Control: max-age=7200 |
| Authorization | Used by a user-agent to authenticate itself to the server. It contains the user agent's credentials related to the resource. It is often used after a 401 response. | Authorization: Basic PAGFXUJC3GKM96Y8SGMUR4Y5GG== |
| Connection | Specifies the options required for this connection. The close value informs the user agent that the connection will be closed after the request. |
Connection: close |
| Content-Encoding | Informs the user agent which coding system has been used on the body content, and then which mechanism will restore the content accordingly to the Content-Type field. |
Content-Encoding: gzip |
| Content-Language | Specifies the language used in the entity-body. If there is none, the content is understoodable in any language. Multiple languages can be listed like en, fr. The field should be applied to all media and not only text documents. |
Content-Language: fr |
| Content-Length | Indicates the size in octets of the entity-body. | Content-Length: 5984 |
| Content-Location | It may be used to indicate the returned location if it is different from the URI requested. It can be absoluteURI or relativeURI |
Content-Location: /index.php |
| Content-MD5 | Indicates the hash of the entity-body processed by the server. The content received is hashed too and compared to the value received to detect transfer issue. However it can't be used to prevent malicious attacks. | Content-MD5: 098f6bcd4621d373cade4e== |
| Content-Range | Indicates which part of the entity-body is in the packet. Due to the fact that the packet may not be received in the same order it has been sent, this information helps the user-agent to rebuild the server's answer in the right order. | Content-Range: bytes 15862-19520/49022 |
| Content-Type | Indicates the media type of the entity-body | Content-Type: text/html; charset=utf-8 |
| Date | Date and time the message has been sent. | Date: Mon, 06 Apr 2015 11:18:56 GMT |
| ETag | Specifies the entity tag of the requested resource. It can be used to compare different resources. | ETag: "ad0234829205b9033196ba818f7a872b" |
| Expires | Specifies the date and time when the data received can be considered as obsolete. After this time the user agent will requested again the data (which may haven't changed in the meantime). | Expires: Mon, 06 Apr 2015 11:18:56 GMT |
| Last-Modified | Indicates when the server thinks the content has been modified the last time. | Last-Modified: Mon, 06 Apr 2015 11:18:56 GMT |
| Location | The server indicates the user-agent to which location the user-agent should move based on the Request-URI sent. For maintenance purposes, the 3xx redirections should be used instead of Location |
Location: http://online-free-tools.com/en/ |
| P3P | Gives the possibility to the website to indicate their intention towards the use of users' personal information. | P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info." |
| Pragma | Specifies specific directives like no-cache for which the user agent should request the content even if it is in cache. |
Pragma: no-cache |
| Proxy-Authenticate | Is part of the 407 Proxy Authentication Required response. It is a challenge containing the authentication scheme and parameters needed for the Request-URI. | Proxy-Authenticate: Basic |
| Retry-After | Indicates for how long the resource will still be unavailable. It can be a date or a delay in seconds. | Retry-After: 180 |
| Server | Details the server software version which processes the request. | Server: Apache/2.4.1 (Unix) |
| Trailer | Indicates that the header information are in a trailer message encoded using a chunked transfer-coding | Trailer: Max-Forwards |
| Transfer-Encoding | Indicates which transformation have been applied to the message (not the entity) to have a safer transfer. | Transfer-Encoding: chunked |
FR
EN