|
|
|
|
|
|
|
|
- Header of HTTP request
- Managing the errors of Web server
- Operating mode of HTTPRequest/HTTPGetResult with a destination
- Retrieval
- Limits
HTTPGetResult (Function) In french: HTTPDonneRésultat Retrieves the result or the header of last HTTP request run. This request was initiated by HTTPRequest or by HTTPSendForm.
// Retrieve the elements of "www.windev.com" Web page
ResStart = HTTPRequest("http://www.windev.com")
IF ResStart = True THEN
ResCode is string = HTTPGetResult()
Info("HTML code: " + ResCode)
ResHeader is string = HTTPGetResult(httpHeader)
Info("Header: " + ResHeader)
ResCookie is string = HTTPGetResult(httpCookie)
Info("Cookie: " + ResCookie)
END
// Example for processing an error returned by the Web server
Url is string
HTTP_Res is string
HTTPError is string
Url = "http://www.amazon.fr/s/ref=nb_ss?__mk_fr_FR=AMAZON&url" + ...
"=search-alias=aps&field-keywords=2746049805"
// Send the request to the Amazon server
IF HTTPRequest(Url) THEN
// The request was sent, it was a valid URL
HTTP_Res = HTTPGetResult()
IF Length(HTTP_Res) = 0 THEN
// Error of the Web server,
// the error details can be found in the page header
HTTPError = HTTPGetResult(httpHeader)
Error(HTTPError)
END
END
Syntax
<Result> = HTTPGetResult([<Type of information>])
<Result>: Buffer or character string - Result of last HTTP request if the httpResult constant is specified.
- Header of last HTTP request if the httpHeader constant is specified.
<Type of information>: Optional constant Type of information to retrieve: | | | httpCookie | Block of cookies (extracted from the HTTP headers). | | httpHeader | Header of last HTTP request. | httpResult
(Default value) | Result of last HTTP request. Caution: In this case, in Unicode, <Result> is a Buffer. |
Remarks Header of HTTP request A header of HTTP request provides various information about the HTTP request (date, server used, etc.). When running the following HTTP request:
ResStart = HTTPRequest("http://www.windev.com")
The retrieved header is:
HTTP/1.1 200 OK<\r><\n>
Date: Tue, 10 Jul 2001 13:19:08 GMT<\r><\n>
Serveur: Apache/1.3.11 (Unix) PHP/4.0.1<\r><\n>
Last-Modified: Thu, 04 Jan 2001 13:20:11 GMT<\r><\n>
ETag: "4107f-5f7b-3a54788b"<\r><\n>
Accept-Ranges: bytes<\r><\n>
Content-Length: 24443<\r><\n>
Connexion: close<\r><\n>
Content-Type: image/gif<\r><\n><\r>
Managing the errors of Web server Some Web servers return an error in the http header. For example, the error can correspond to a notification for page move (url rewriting). If the content of the page returned by HTTPGetResult is empty, you must check the page header. Example of error header when moving a page (url rewriting):
HTTP/1.1 302 MovedTemporarily
Date: Wed, 30 Sep 2009 15:38:48 GMT
Serveur: Serveur
x-amz-id-1: 1KR8DDF5DV380D14DHTC
x-amz-id-2: pU0oo3rO/L+5kLNg4Yc4MPd0jF3qwyEI4nGaOhMgYkk=
Location: http://www.amazon.fr/WinDev-14-fundamental-d%C3%A9veloppement
-Pr%C3%A9sentation/dp/2746049805/ref=sr_11_1/277-8952281-8252733?ie=
UTF8&qid=1254325128&sr=11-1
Vary: Accept-Encoding,User-Agent
nnCoection: close
Content-Type: text/html; charset=ISO-8859-15
Set-cookie: session-id-time=1254866400l; path=/; domain=.amazon.fr;
expires=Tue Oct 06 22:00:00 2009 GMT
Set-cookie: session-id=277-8952281-8252733; path=/; domain=.amazon.fr;
expires=Tue Oct 06 22:00:00 2009 GMT
Content-Length: 0
Retrieval HTTPGetResult can also be used to retrieve an image or a binary document (see the Example).
This page is also available for…
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|