![]() If your service has multiple IP addresses, OkHttp will attempt alternate addresses if theįirst connect fails. OkHttp perseveres when the network is troublesome: it will silently recover from common connection Response caching avoids the network completely for repeat requests.Transparent GZIP shrinks download sizes.Connection pooling reduces request latency (if HTTP/2 isn’t available).HTTP/2 support allows all requests to the same host to share a socket.OkHttp is an HTTP client that’s efficient by default: Doing HTTPĮfficiently makes your stuff load faster and saves bandwidth. The Web browser then combines these resources to present the complete document, the Web page.HTTP is the way modern applications network. It then parses this file, making additional requests corresponding to execution scripts, layout information (CSS) to display, and sub-resources contained within the page (usually images and videos). To display a Web page, the browser sends an original request to fetch the HTML document that represents the page. It is never the server (though some mechanisms have been added over the years to simulate server-initiated messages). The browser is always the entity initiating the request. This role is primarily performed by the Web browser, but it may also be performed by programs used by engineers and Web developers to debug their applications. The user-agent is any tool that acts on behalf of the user. HTTP can also be used to fetch parts of documents to update Web pages on demand. It is an application layer protocol that is sent over TCP, or over a TLS-encrypted TCP connection, though any reliable transport protocol could theoretically be used.ĭue to its extensibility, it is used to not only fetch hypertext documents, but also images and videos or to post content to servers, like with HTML form results. The messages sent by the client, usually a Web browser, are called requests and the messages sent by the server as an answer are called responses.ĭesigned in the early 1990s, HTTP is an extensible protocol which has evolved over time. It is the foundation of any data exchange on the Web and it is a client-server protocol, which means requests are initiated by the recipient, usually the Web browser.Ī complete document is reconstructed from the different sub-documents fetched, for instance, text, layout description, images, videos, scripts, and more.Ĭlients and servers communicate by exchanging individual messages (as opposed to a stream of data). HTTP is a protocol for fetching resources such as HTML documents. Permissions-Policy: xr-spatial-tracking Experimental.Permissions-Policy: speaker-selection Experimental.Permissions-Policy: serial Experimental.Permissions-Policy: screen-wake-lock Experimental.Permissions-Policy: publickey-credentials-get Experimental.Permissions-Policy: picture-in-picture Experimental.Permissions-Policy: payment Experimental.Permissions-Policy: magnetometer Experimental.Permissions-Policy: local-fonts Experimental.Permissions-Policy: idle-detection Experimental.Permissions-Policy: gyroscope Experimental.Permissions-Policy: gamepad Experimental.Permissions-Policy: execution-while-out-of-viewport Experimental.Permissions-Policy: execution-while-not-rendered Experimental.Permissions-Policy: encrypted-media Experimental.Permissions-Policy: document-domain Experimental.Permissions-Policy: battery Experimental. ![]() Permissions-Policy: autoplay Experimental.Permissions-Policy: ambient-light-sensor Experimental.Permissions-Policy: accelerometer Experimental.Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed.Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channel.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'.Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'.Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'.Reason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'.Reason: CORS request external redirect not allowed.Reason: CORS preflight channel did not succeed.Reason: CORS header 'Origin' cannot be added.Reason: CORS header 'Access-Control-Allow-Origin' missing.Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'.CSP: require-trusted-types-for Experimental. ![]() ![]()
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