The recommendation is was to start their name with “X-“. E.g. X-Forwarded-For, X-Requested-With. This is also mentioned in a.o. section 5 of RFC 2047. Update 1: On June 2011, the first IETF draft was posted to deprecate the recommendation of using the “X-” prefix for non-standard headers. The reason is that when non-standard headers prefixed … Read more
An HTTP multipart request is an HTTP request that HTTP clients construct to send files and data over to an HTTP Server. It is commonly used by browsers and HTTP clients to upload files to the server. What it looks like See Multipart Content-Type See multipart/form-data
Because when I use one or another I get a window prompt asking me to download the file for both of them. This behavior depends on the browser and the file you are trying to serve. With inline, the browser will try to open the file within the browser. For example, if you have a … Read more
The resource could be being blocked by an extension (AdBlock in my case). The message is there because the request to retrieve that resource was never made, so the headers being shown are not the real thing. As explained in the issue you referenced, the real headers are updated when the server responds, but there … Read more
No, HTTP does not define any limit. However most web servers do limit size of headers they accept. For example in Apache default limit is 8KB, in IIS it’s 16K. Server will return 413 Entity Too Large error if headers size exceeds that limit. Related question: How big can a user agent string get?
Cross site approach To allow receiving & sending cookies by a CORS request successfully, do the following. Back-end (server): Set the HTTP header Access-Control-Allow-Credentials value to true. Also, make sure the HTTP headers Access-Control-Allow-Origin and Access-Control-Allow-Headers are set and not with a wildcard *. For more info on setting CORS in express js read the … Read more
A good reason is for security – this can prevent CSRF attacks because this header cannot be added to the AJAX request cross domain without the consent of the server via CORS. Only the following headers are allowed across origins: Accept Accept-Language Content-Language Last-Event-ID Content-Type any others cause a “pre-flight” request to be issued in … Read more
It will/may be empty when the enduser entered the site URL in browser address bar itself. visited the site by a browser-maintained bookmark. visited the site as first page in the window/tab. clicked a link in an external application. switched from a https URL to a http URL. switched from a https URL to a … Read more
The instances of the new HttpHeader class are immutable objects. Invoking class methods will return a new instance as result. So basically, you need to do the following: let headers = new HttpHeaders(); headers = headers.set(‘Content-Type’, ‘application/json; charset=utf-8’); or const headers = new HttpHeaders({‘Content-Type’:’application/json; charset=utf-8′}); Update: adding multiple headers let headers = new HttpHeaders(); headers … Read more
There are several solutions depending on what you need… If you want to add a custom header (or set of headers) to an individual request then just add the headers property: // Request with custom header $.ajax({ url: ‘foo/bar’, headers: { ‘x-my-custom-header’: ‘some value’ } }); If you want to add a default header (or … Read more