如何在Progress/OpenEdge ABL中进行HTTP GET和POST? [英] How do I do HTTP GET and POST in Progress/OpenEdge ABL?
问题描述
Progress文档在SOAP上花了很多墨水，但是我很难找到带有Progress ABL的简单HTTP GET/POST的示例.
The Progress docs spill plenty of ink on SOAP, but I'm having trouble finding the example for a simple HTTP GET/POST with Progress ABL.
如何在URL中获取和发布字符串?
How do I GET and POST strings to/from a URL?
URL可以为https://吗?
Can the URL be https://?
Progress是否可以提供HTTP Basic或HTTP Digest身份验证?
Can Progress provide HTTP Basic or HTTP Digest authentication?
推荐答案
Openedge内置了用于处理SOAP服务的语句，但没有针对GET/POST的简单语句.但是，它确实具有一种读/写特定套接字的机制.因此，您可以使用它来构建HTTP发布例程，或者就此而言，该例程可以处理任何其他基于套接字的协议.
Openedge has built in statements for handling SOAP services, but no simple statement for a GET/POST. What it does have, however, is a mechanism to read / write to specific sockets. So you could use this to build a HTTP post routine, or for that matter a routine to handle any other socket based protocol.
有一个例程-http.p-它将为您执行GET.如果没有其他内容，将让您看到套接字编程的工作方式.您应该能够很容易地对其进行修改，以执行简单的POST，但是使用SSL或进入身份验证可能会花费很多工作.在这种情况下，退出CURL可能会更容易.
There is a routine - http.p - which will do a GET for you. Will let you see how the socket programming works if nothing else. You should be able to modify it quite easily to do a simple POST, but using SSL or getting into authentication might take quite a bit of work. You might be easier just dropping out to CURL in this case.
http.p以前可以从freeframework.org上获得，但是我刚刚检查了该域名，并且该域名已经过期，因此我在下面发布了代码.
http.p used to be available from freeframework.org, but I've just checked and that domain has expired, so I've posted the code below.
/*-----------------------------------------------------------------------*
File........: http.p
Version.....: 1.1
Description : Makes a "Get" request from an HTTP server
Input Param : pHost = host name (without the "http://")
pPort = port number (usually 80)
pURL = begin with the first slash after the domain name.
Output Param: pResult = 0 or 1 (character)
pResponse = http headers returned
pContent = the document returned.
Author......: S.E. Southwell, Mario Paranhos - United Systems, Inc. (770) 449-9696
Created.....: 12/13/2000
Notes.......: Will not work with HTTPS.
Usage:
define var v-result as char no-undo.
define var v-response as char no-undo.
define var v-content as char no-undo.
{&out} "Hello" skip.
put stream webstream control null(0).
run proc/http.p("www.whosplayin.com","80","/",output v-result,output v-response,output v-content).
{&out} v-result "<hr>" skip
html-encode(v-response) "<hr>" skip
html-encode(v-content) "<hr>" skip
.
Last Modified: 10/20/01 - SES - Fixed to work in batch mode, or within a UDF.
--------------------------------------------------------------------------*/
&SCOPED-DEFINE HTTP-NEWLINE CHR(13) + CHR(10)
&SCOPED-DEFINE RESPONSE-TIMEOUT 45
DEFINE INPUT PARAMETER pHOST AS CHAR NO-UNDO.
DEFINE INPUT PARAMETER pPORT AS CHAR NO-UNDO.
DEFINE INPUT PARAMETER pURL AS CHAR NO-UNDO.
DEFINE OUTPUT PARAMETER pRESULT AS CHAR NO-UNDO.
DEFINE OUTPUT PARAMETER pRESPONSE AS CHAR NO-UNDO.
DEFINE OUTPUT PARAMETER pContent AS CHAR NO-UNDO.
DEFINE VARIABLE requestString AS CHAR NO-UNDO.
DEFINE VARIABLE vSocket AS HANDLE NO-UNDO.
DEFINE VARIABLE vBuffer AS MEMPTR NO-UNDO.
DEFINE VARIABLE vloop AS LOGICAL NO-UNDO.
DEFINE VARIABLE vPackets AS INTEGER NO-UNDO.
DEFINE VARIABLE wStatus AS LOGICAL NO-UNDO.
ASSIGN requestString = "GET " + pURL + " HTTP/1.0" + {&HTTP-NEWLINE} +
"Accept: */*" + {&HTTP-NEWLINE} +
"Host: " + phost + {&HTTP-NEWLINE} +
/*"Connection: Keep-Alive" + {&HTTP-NEWLINE} + */
{&HTTP-NEWLINE}.
/*OPEN THE SOCKET*/
CREATE SOCKET vSocket.
vSocket:SET-READ-RESPONSE-PROCEDURE ("readHandler",THIS-PROCEDURE).
ASSIGN wstatus = vSocket:CONNECT("-H " + phost + " -S " + pport) NO-ERROR.
/*Now make sure the socket is open*/
IF wstatus = NO THEN DO:
pResult = "0:No Socket".
DELETE OBJECT vSocket.
RETURN.
END.
/*Got socket - Now make HTTP request*/
SET-SIZE(vBuffer) = LENGTH(requestString) + 1.
PUT-STRING(vBuffer,1) = requestString.
vSocket:WRITE(vBuffer, 1, LENGTH(requestString)).
SET-SIZE(vBuffer) = 0.
/*Wait for a response*/
ASSIGN vloop = TRUE. /*Turns off automatically when request is done*/
DEFINE VAR vstarttime AS INTEGER.
ASSIGN vstarttime = etime.
WAITLOOP: DO WHILE vloop:
PROCESS EVENTS.
PAUSE 1.
/* Build in timer in case sending is never set to NO
this will terminate the program after 60 seconds
start-Etime will be reset by WriteData each time there
is activity on the socket to allow for long transmissions */
IF vstarttime + ({&RESPONSE-TIMEOUT} * 1000) < ETIME
THEN DO:
MESSAGE "timed out at " + string(etime - vstarttime) + " msec".
vSocket:DISCONNECT().
ASSIGN pResult = "0:Failure".
RETURN.
END. /*No Response, or timed out*/
END.
/*At this point, pResponse should be populated with the result (up to 32K)*/
vSocket:DISCONNECT().
DELETE OBJECT vSocket.
/*All Done!*/
ASSIGN pResult = "1:Success".
ASSIGN
pContent = SUBSTRING(pResponse,INDEX(pResponse,{&HTTP-NEWLINE} + {&HTTP-NEWLINE}),-1)
.
ASSIGN
pResponse = SUBSTRING(pResponse,1,INDEX(pResponse,{&HTTP-NEWLINE} + {&HTTP-NEWLINE}))
.
RETURN.
/*Handle the response from the webserver*/
PROCEDURE readHandler:
DEFINE VARIABLE bytesAvail AS INTEGER NO-UNDO.
DEFINE VARIABLE b AS MEMPTR NO-UNDO.
DEFINE VARIABLE lastBytes AS INTEGER NO-UNDO.
IF vSocket:connected() THEN ASSIGN bytesAvail = vSocket:GET-BYTES-AVAILABLE().
IF bytesAvail = 0 THEN DO: /*All Done*/
ASSIGN vloop = FALSE.
RETURN.
END.
/*OK, there's something on the wire... Read it in*/
SET-SIZE(b) = bytesAvail + 1.
vSocket:READ(b, 1, bytesAvail, 1).
ASSIGN pResponse = pResponse + GET-STRING(b,1).
SET-SIZE(b) = 0.
END PROCEDURE. /*readHandler*/
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