LAMW: jHttpClient - how to make soap call? (http POST) - little
workaround
lazarus / 43-Android

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Bazic · 2017-09-22 12:08

First of all: to all LAMW group members: Your work is GREAT !!!!

I try to use android as a client of my soap server app as I used to on
wince target.
It seems on android target this is very, very different.

I coud not achieve jHttpClient making calls to soap server. (Maybe I
was completely wrong in a way doing that - if so - please lighten me
up)
I tried to do raw POST, but xml part was always mangled. Server
replied with an error.

I looked under the hood  and I figured out workaround.

Below is little example code:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i  
jHttpClient1.ClearNameValueData; 
jHttpClient1.AddClientHeader('Content-Type','text/xml;
charset=utf-8');  jHttpClient1.AddClientHeader('SOAPAction',
'"urn:OSWIntf-IOSW#Wersja"');   content:='<?xml version="1.0"
encoding="UTF-8"?>'#13#10  +'<SOAP-ENV:Envelope xmlns:SOAP-
ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:ns1="urn:OSWIntf-IOSW" ' 
+'xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-
ENC="http://schemas.xmlsoap.org/soap/encoding/" '  +'SOAP-
ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">' 
+'<SOAP-ENV:Body><ns1:Wersja/></SOAP-ENV:Body></SOAP-ENV:Envelope>';  
jHttpClient1.AddNameValueData('BODY',content);  
jHttpClient1.PostNameValueDataAsync('http://192.168.1.3/soap/IOSW'); 

"Wersja" is function name I try to call at the server side.

Of course in my POST instead of expected raw xml data was: BODY=<?xml
version="1.0"....   but encoded as: BODY==3c=3fxml
version=3d1.0=3d........


When I changed some lines of getPostDataString function in a file
jHttpClient.java placed in:
C:\lamw\lazandroidmodulewizard\java\lamwdesigner

(starting at line # 163)

from:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i           
   result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));        
    result.append("=");             
result.append(URLEncoder.encode(entry.getValue(), "UTF-8")); 
to:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i        if
(entry.getKey().equals("BODY")==true) {                     
 result.append(entry.getValue());        } else {             
result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));           
 result.append("=");             
result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));        } 
then "BODY" key became special. If it is first key then its name will
not be used and its value will not be url encoded and xml structure
will be fine for soap server.

I have two questions here: Is there any better way to consume soap
services wiyh LAMW? Is there possibility to (somehow) use WST package?

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jmpessoa · 2017-09-22 21:20

(1)I think the issue is how  android api handle:
"jHttpClient1.AddNameValueData('BODY',content);"
when  we have others "=" in "content"...   I will try some solution!

(2)To use FPC "FCL" core, often we need to copy the source code to
your project "jni"  folder ....

Example: To use  "fphttpclient" copy "fphttpclient.pp",  "httpdefs.pp"
and "httpprotocol.pp" to your project "jni" folder

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jmpessoa · 2019-03-25 07:03

Ok.

I improved jHttpClient!

Some general solution:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
jHttpClient1.SetUnvaluedNameData('BODY'); //disregard nameData
'BODY' jHttpClient1.SetEncodeValueData(False);  //not encode ValueData
 jHttpClient1.AddNameValueData('BODY',content); jHttpClient1.PostNameV
alueDataAsync('http://192.168.1.3/soap/IOSW');

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Robert Gilland · 2019-03-25 11:44

Just a quick question why were not these changes available in Lazarus
-> Online Package Manager - LAMW --> Update?