gateway error unable to read response or response empty

HTTP Status Response code explanation/DaquanThe HTTP status code is a 3-bit numeric code that represents the HTTP response status of the Web server. It is defined by the RFC 2616 specification and is extended by RFC 2518, RFC 2817, RFC 2295, RFC 2774

100 The client should continue to send the request. This temporary response is used to inform the client that some of its requests have been received by the server and are still not rejected. The client should continue to send the remainder of

The HTTP status Code (response code) is used to indicate whether the HTTP request has completed successfully. The HTTP response type is divided into five categories: message response, successful response, redirect, client error, server-side

HTTP Status Code table (version 1) Continue continues. The client should continue its request 101 switching protocols switch protocol. The server switches the protocol based on the client's request. You can only switch to a more advanced protocol,

(1-word head)This type of status code, on behalf of which the request has been accepted, needs to be processed. This type of response is a temporary response that contains only the status line and some optional response header information and ends

Some common HTTP status codes are:200– server successfully returned to Web page404– The requested page does not exist503– Service Not availableCommon HTTP status Code Daquan1XX (Temporary response)A status code that represents a temporary response

HTTP RequestThe client requests access to the resource to the server by sending an HTTP request. The HTTP request consists of three parts: the request line, the message header, and the request for essay.3.1. Request LineThe request line begins with

Message this type of status code, on behalf of the request has been accepted, need to continue processing. This type of response is a temporary response that contains only the status line and some optional response header information and ends with a

Part of hypertext Transfer Protocol--http/1.1RFC 2616 Fielding, et al.10 Status Code rule (status code definitions)This article describes the relevant rules for each status code, including the method to be followed by the corresponding status code

As is known to all, each HTTP response is provided with an HTTP status code, which is the code used to represent the HTTP server response status. It is defined by the RFC 2616 specification and is extended by RFC 2518, RFC 2817, RFC 2295, RFC 2774,