{
"requests":[
{"key":"Accept","desc":"Content-Types that are acceptable.","example":"Accept: text/plain"},
{"key":"Accept-Charset","desc":"Character sets that are acceptable","example":"Accept-Charset: utf-8"},
{"key":"Accept-Encoding","desc":"Acceptable encodings","example":"Accept-Encoding: <compress | gzip | deflate | identity>"},
{"key":"Accept-Language","desc":"Acceptable languages for response","example":"Accept-Language: en-US"},
{"key":"Authorization","desc":"Authentication credentials for HTTP authentication","example":"Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ=="},
{"key":"Cache-Control","desc":"Used to specify directives that MUST be obeyed by all caching mechanisms along the request/response chain","example":"Cache-Control: no-cache"},
{"key":"Connection","desc":"What type of connection the user-agent would prefer","example":"Connection: close"},
{"key":"Cookie","desc":"an HTTP cookie previously sent by the server with Set-Cookie","example":"Cookie: $Version=1; Skin=new;"},
{"key":"Content-Length","desc":"The length of the request body in octets (8-bit bytes)","example":"Content-Length: 348"},
{"key":"Content-Type","desc":"The mime type of the body of the request (used with POST and PUT requests)","example":"Content-Type: application/x-www-form-urlencoded"},
{"key":"Date","desc":"The date and time that the message was sent","example":"Date: Tue, 15 Nov 1994 08:12:31 GMT"},
{"key":"Expect","desc":"Indicates that particular server behaviors are required by the client","example":"Expect: 100-continue"},
{"key":"From","desc":"The email address of the user making the request","example":"From: user@example.com"},
{"key":"Host","desc":"The domain name of the server (for virtual hosting), mandatory since HTTP/1.1","example":"Host: en.wikipedia.org"},
{"key":"If-Match","desc":"Only perform the action if the client supplied entity matches the same entity on the server. This is mainly for methods like PUT to only update a resource if it has not been modified since the user last updated it.","example":"If-Match: \"737060cd8c284d8af7ad3082f209582d\""},
{"key":"If-Modified-Since","desc":"Allows a 304 Not Modified to be returned if content is unchanged","example":"If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT"},
{"key":"If-None-Match","desc":"Allows a 304 Not Modified to be returned if content is unchanged, see HTTP ETag","example":"If-None-Match: \"737060cd8c284d8af7ad3082f209582d\""},
{"key":"If-Range","desc":"If the entity is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity","example":"If-Range: \"737060cd8c284d8af7ad3082f209582d\""},
{"key":"If-Unmodified-Since","desc":"Only send the response if the entity has not been modified since a specific time.","example":"If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT"},
{"key":"Max-Forwards","desc":"Limit the number of times the message can be forwarded through proxies or gateways.","example":"Max-Forwards: 10"},
{"key":"Pragma","desc":"Implementation-specific headers that may have various effects anywhere along the request-response chain","example":"Pragma: no-cache"},
{"key":"Proxy-Authorization","desc":"Authorization credentials for connecting to a proxy.","example":"Proxy-Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ=="},
{"key":"Range","desc":"Request only part of an entity. Bytes are numbered from 0.","example":"Range: bytes=500-999"},
{"key":"Referer","desc":"This is the address of the previous web page from which a link to the currently requested page was followed.","example":"Referer: http://en.wikipedia.org/wiki/Main_Page"},
{"key":"TE","desc":"The transfer encodings the user agent is willing to accept: the same values as for the response header Transfer-Encoding can be used, plus the \"trailers\" value (related to the \"chunked\" transfer method) to notify the server it accepts to receive additional headers (the trailers) after the last, zero-sized, chunk.","example":"TE: trailers, deflate"},
{"key":"Upgrade","desc":"Ask the server to upgrade to another protocol","example":"Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11"},
{"key":"User-Agent","desc":"The user agent string of the user agent","example":"User-Agent: Mozilla/5.0 (Linux; X11)"},
{"key":"Via","desc":"Informs the server of proxies through which the request was sent.","example":"Via: 1.0 fred, 1.1 nowhere.com (Apache/1.1)"},
{"key":"Warning","desc":"A general warning about possible problems with the entity body.","example":"Warning: 199 Miscellaneous warning"}
],
"responses": [
{"key":"Accept-Ranges","desc":"What partial content range types this server supports","example":"Accept-Ranges: bytes"},
{"key":"Age","desc":"The age the object has been in a proxy cache in seconds","example":"Age: 12"},
{"key":"Allow","desc":"Valid actions for a specified resource. To be used for a 405 Method not allowed","example":"Allow: GET, HEAD"},
{"key":"Cache-Control","desc":"Tells all caching mechanisms from server to client whether they may cache this object","example":"Cache-Control: max-age"},
{"key":"Content-Encoding","desc":"The type of encoding used on the data","example":"Content-Encoding: gzip"},
{"key":"Content-Language","desc":"The language the content is in","example":"Content-Language: da"},
{"key":"Content-Length","desc":"The length of the response body in octets (8-bit bytes)","example":"Content-Length: 348"},
{"key":"Content-Location","desc":"An alternate location for the returned data","example":"Content-Location: /index.htm"},
{"key":"Content-Disposition","desc":"An opportunity to raise a \"File Download\" dialogue box for a known MIME type","example":"Content-Disposition: attachment; filename=fname.ext"},
{"key":"Content-MD5","desc":"A Base64-encoded binary MD5 sum of the content of the response","example":"Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ=="},
{"key":"Content-Range","desc":"Where in a full body message this partial message belongs","example":"Content-Range: bytes 21010-47021/47022"},
{"key":"Content-Type","desc":"The mime type of this content","example":"Content-Type: text/html; charset=utf-8"},
{"key":"Date","desc":"The date and time that the message was sent","example":"Date: Tue, 15 Nov 1994 08:12:31 GMT"},
{"key":"ETag","desc":"An identifier for a specific version of a resource, often a Message Digest, see ETag","example":"ETag: \"737060cd8c284d8af7ad3082f209582d\""},
{"key":"Expires","desc":"Gives the date/time after which the response is considered stale","example":"Expires: Thu, 01 Dec 1994 16:00:00 GMT"},
{"key":"Last-Modified","desc":"The last modified date for the requested object, in RFC 2822 format","example":"Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT"},
{"key":"Link","desc":"Used to express a typed relationship with another resource, where the relation type is defined by RFC 5988","example":"Link: </feed>; rel=\"alternate\""},
{"key":"Location","desc":"Used in redirection, or when a new resource has been created.","example":"Location: http://www.w3.org/pub/WWW/People.html"},
{"key":"P3P","desc":"This header is supposed to set P3P policy, in the form of P3P:CP=\"your_compact_policy\". However, P3P did not take off[2], most browsers have never fully implemented it, a lot of websites set this header with fake policy text, that was enough to fool browsers the existence of P3P policy and grant permissions for third party cookies.","example":"P3P: CP=\"This is not a P3P policy! See http://www.google.com/support/accounts/b
