Sends a user defined HTTP header to the web server.Example usage: Use an ssh tunnel for requests previously tagged as " User-Agent: fetch libfetch/2.0" and make sure resuming downloads continues to work. For example, the HTTP OPTIONS method has a specially define request target for magic that concerns the server and not a specific path, and it uses for that.As comparison, a recent test version of Firefox on a Linux machine sent this User-Agent header HTTP Request Header. This information is not the same as the form (query) data.For example, PNG files have good compression characteristics but are not widely supported in browsers.Differentiating Among Different Browser Types. Use User-Agent only when necessary. Contents of the User-Agent: header from the current request, if there is one.This happens, for example, when calling the page through a call to streamcontextcreate() with a HTTP header of requestfulluri set to 1. As of 2015, no user agent requirement is technically enforced in general, though it may be enforced in specific cases as needed. As of February 15, 2010, Wikimedia sites require a HTTP User-Agent header for all requests. It was one of those it worked yesterday moments for sure. After some research, I discovered that GitHub had changed their API to make it mandatory to specify the user agent header for all of its API calls. HTTP request header: UserAgent variable. Ask Question. up vote 19 down vote favorite.product token ["/" product-version] product-version token. Examples: User-Agent: CERN-LineMode/2.15 libwww/2.17b3 Server: Apache/0.
8.4. The User-Agent request header contains a characteristic string that allows the network protocol peers to identify the application type, operating system, software vendor or software version of the requesting software user agent. Wget and User-Agent Header. Submitted by Igor on June 29, 2009 12:41 pm 7 Comments. As you may already know, Wget is a popular (particularly in the Unix world) command-line downloader and Web crawler application. In PHP, it can be found with: SERVER[HTTPUSERAGENT].As the name suggests, this HTTP header contains the referring url. For example, if I visit the Nettuts homepage, and click on an article link, this header is sent to my browser 26848 header: Connection: close. If you still have your Python IDE open from the previous sections example, you can skip this, but this turns on HTTP debugging so you can seeIf you look closely, youll notice that you defined a User-Agent header, but you actually sent a User-agent header. Introduced: PhantomJS 1.5. This property specifies additional HTTP request headers that will be sent to the server for every request issued (for pages and resources).
Please note that the User-Agent should be set using the page.settings, setting the User-Agent property in this propertyExamples. XML Reference XML Http Reference XSLT Reference XML Schema Reference.More "Try it Yourself" examples below. Definition and Usage. The userAgent property returns the value of the user-agent header sent by the browser to the server. As mentioned in our overview of HTTP requeset headers, the user-agent header specifies information about the browser or robot that made the request. Here are some examples of user-agent strings HTTP Header Viewer for PC 1.03.browser User-Agent and other useful device info. Data can. By default urllib2 identifies itself as Python-urllib/2.7 : GET / HTTP/1.1" 200 151 "-" "Python-urllib/2.7". That can sometimes be confusing for certain sites. With the useragent header in Python, its possible to alter that and specify any identity you like. The example below, use the Mozilla When working with older versions of Http Client (pre 4.3), setting the value of the User-Agent was done via a low level APIThis article illustrated how you can use the HttpClient to send requests with custom User-Agent header for example to simulate the behavior of a specific browser. HTTP Features ». User-Agent and Referer Headers. Universal Feed Parser sends a default User-Agent string when it requests a feed from a web server.Previous topic. ETag and Last-Modified Headers. How to set Custom User-Agent Header.