The HTTP request does not have status information because the user closes/cancels the request before the HTTP return, or the firewall. W3C has a corresponding Description: http://www.w3.org/TR/XMLHttpRequest/#the-status-attribute4.7.1
StatusAttribute
Client. Status
Returns the HTTP status code.
Common HTTP status codes and common http Status Codes
200 OK request successful. It is generally used for GET and POST requests.
301 Moved Permanently is Permanently Moved. The requested resource has been permanently moved to the new URI. The returned information will include the new URI, And the browser will automatically redirect to the new URI. In the future, any new request should be replaced by a new U
Continue to debug the WCF web API todaySource codeThe direction is to track its unit test, and an error occurs when the result is reached:
HTTP cocould not register URL http: // +: 8000/testservice/. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink? Linkid = 70353 for details ).
After some searching, I reali
When we visit a webpage, the browser sends a request to the Web page's owning server. Before the browser receives the server response information and displays the Web page, the server sends a header with an HTTP status code in response to the client request.
Common HTTP Status codes:
404: The requested resource or webpage does not exist
$: Request succeeded
301: The resource (or Web page) is p
HTTP1.0 HTTP 1.1 main differences Long Connection
HTTP 1.0 requires the use of the keep-alive parameter to tell the server to establish a long connection, while HTTP1.1 supports long connections by default.
HTTP is based on the TCP/IP protocol, the creation of a TCP connection requires three handshake, there is a certain cost, if each communication to re-establis
Recently, the architecture of the system has been optimized to invoke WCF with the WinForm impersonation client, a bus from WCF that pushes the received message to each sub side. It would have been simple to invoke the relationship, and after the WCF service was deployed to IIS, it had been reported that an error occurred while receiving the HTTP response to Http://lenovo-y460:8099/Service.svc. This may be
1. Establish a TCP connection before HTTP work begins, the Web browser first establishes a connection to the Web server over the network, which is done through TCP, which works with the IP protocol to build the Internet, known as the TCP/IP protocol family, So the internet is also known as a TCP/IP network. HTTP is a higher level of application-level protocol than TCP, according to the rules, only the lower
Initiate an interactive request for the HTTP protocol:Want to initiate can be initiated (in line with the World Wide Web System developed HTTP protocol can be specified in the format of the request header, request body, etc.), but can not return and return what is determined by the target interface. If a problem is returned, is the generated status code detected and returned by the World Wide Web system? Wh
The first time I installed bugfree today, it was okay to access localhostxampp. An error occurred when I accessed localhostbugfree. thank you? The error message is as follows: Objectnotfound! TherequestedURLwasnotfoundonthisserver. IfyouenteredtheURLm is installed for the first time today. it is okay to access http: // localhost/xampp/and access http: // localhost/bugfree. thank you?
The error message is as
HTTP protocol learning and http protocol Learning
1. HTTP Overview
HTTP is actually a set of language communication rules! Http uses a reliable data transmission protocol. Therefore, even if the data comes from the other end of the earth, it can ensure that the data is not d
Tomcat throws an error when the Mobile client submits an HTTP request to the server:December 31, 2014 2:32:45 pm Org.apache.coyote.http11.AbstractHttp11Processor ProcessInfo: Error parsing HTTP Request HeaderNote:further occurrences of HTTP header parsing errors'll be logged at DEBUG level.After debugging, it is found that Tomcat's header buffer size is not enoug
Use mina to parse http and mina to parse httpIn the process of using mina, we usually Customize various packets to use our own services. Today, we will bring you a decoding process similar to the http protocol.Mina has its own decoding class for parsing http packets. You can use maven to configure the content to obtain the source code:
Or download the mina source
[Reading Notes] iOS network-HTTP-URL percent code, ios-http-url
Code:
-(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // URL percent code // URL encoding will encode , question marks and other punctuation marks. NSString * urlString = @ "http://myhost.com? Query = This is a question "; NSString
I. Conceptual BasisReference Original: 73468040The caching of HTTP, mainly in the local browser and Web proxy server. Here, we are talking about the browser cache.1. Response header ETag (Entity Tag)The etag is used to represent a resource. This value is included when the server returns a response, and different resource response return the same etag. The next time the same resource is requested, the browser will pass the ETag to the server in If-none
Gets the header information for the HTTP request.
The PHP manual provides a ready-made function:
Getallheaders
(PHP 4, PHP 5)
Getallheaders-fetch all HTTP Request headers
Description
Arraygetallheaders (void)
Fetches all HTTP headers from the current request.
This function is a alias forapache_request_headers (). Please read the theapache_request_headers () docum
HTTP-based breakpoint transmission and HTTP breakpoint Transmission
A file downloading function similar to thunder is required in recent projects. This type of requirement may be common and may be helpful to those in need.
Requirements:
1. Support for breakpoint Transmission
2. Simultaneous download of multiple files
3. Because it is an internal trial by the customer, the server only supports downloading
Explanation of HTTP status codes and explanation of http Status Codes
1xx: Information
Message
Description
100 Continue
The server only receives some requests, but once the server does not reject the request, the client should continue to send other requests.
101 Switching Protocols
Server conversion protocol: the server converts client-compliant requests to anothe
original installation package, Chinese files, registration machine download: http://pan.baidu.com/s/1bMv1Si Password: cqq1First, install: Download and install the original English download page: http://www.ieinspector.com/download.htmlStandalone version (single client, ie plugin not included): Https://s3.amazonaws.com/ieinspe ... lyzerstd_v7.5.4.exeFull version (including client, ie plugin, Firefox plugin)
What is the working principle of HTTP? How to optimize the HTTP protocol ?, Protocol Working Principle
Optimization made by http1.0
Bandwidth: latency has been solved at this stage: 1. browser blocking: the browser can only connect to the same domain name with four connections at the same time. latency: 2. DNS query: The Browser needs to know the IP address of the target server to establish a connection del
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.