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
According to Network security configuration – Starting with Android 9 (API level 28), cleartext support is disabled by default. Also have a look at Android M and the war on cleartext traffic Codelabs explanation from Google Option 1 – First try hitting the URL with https:// instead of http:// Option 2 – Create file res/xml/network_security_config.xml … Read more
TL;DR Summary; if you have binary (non-alphanumeric) data (or a significantly sized payload) to transmit, use multipart/form-data. Otherwise, use application/x-www-form-urlencoded. The MIME types you mention are the two Content-Type headers for HTTP POST requests that user-agents (browsers) must support. The purpose of both of those types of requests is to send a list of name/value … Read more
The values are sent in the request body, in the format that the content type specifies. Usually the content type is application/x-www-form-urlencoded, so the request body uses the same format as the query string: parameter=value&also=another When you use a file upload in the form, you use the multipart/form-data encoding instead, which has a different format. … Read more
For a PUT request: HTTP 200, HTTP 204 should imply “resource updated successfully”. HTTP 201 if the PUT request created a new resource. For a DELETE request: HTTP 200 or HTTP 204 should imply “resource deleted successfully”. HTTP 202 can also be returned by either operation and would imply that the instruction was accepted by … Read more
First a disclaimer beforehand: the posted code snippets are all basic examples. You’ll need to handle trivial IOExceptions and RuntimeExceptions like NullPointerException, ArrayIndexOutOfBoundsException and consorts yourself. In case you’re developing for Android instead of Java, note also that since introduction of API level 28, cleartext HTTP requests are disabled by default. You are encouraged to … Read more
Roy Fielding’s comment about including a body with a GET request. Yes. In other words, any HTTP request message is allowed to contain a message body, and thus must parse messages with that in mind. Server semantics for GET, however, are restricted such that a body, if any, has no semantic meaning to the request. … Read more