Extracting Tag Value from XML returned when a web service via PL/SQL

Question

All,
Good afternoon.
I have a PL/SQL that called a web service. The code is as below:
create or replace procedure soap3 as
soap_request varchar2(30000);
soap_respond varchar2(30000);
http_req utl_http.req;
http_resp utl_http.resp;
resp XMLType;
i integer;
bra number := 205;
cus number := 134988;
cur number := 1;
led number := 0;
sub number := 0;
chq number := 1;
n number;
v_raw RAW(32767);
buff RAW(32767);
http_res UTL_HTTP.resp;
blob_length INTEGER;
chunk_size BINARY_INTEGER := 32767;
blob_position INTEGER := 1;
out_file UTL_FILE.FILE_TYPE;
name VARCHAR2(256);
value VARCHAR2(1024);
v_buffer RAW(32767);
begin
soap_request := '<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<Validate_Mandate xmlns="http://tempuri.org/Clearing_Workflow/Service1">
<Bra_code>205</Bra_code>
<Cus_num>134988</Cus_num>
<Cur_code>0</Cur_code>
<Led_code>0</Led_code>
<sub_acct_Code>0</sub_acct_Code>
</Validate_Mandate>
</soap:Body>
</soap:Envelope>';
--DBMS_LOB.CREATETEMPORARY(buff,true);
http_req := utl_http.begin_request('http://10.99.0.13/clearinginwards/InwardCheques.asmx',
'POST',
'HTTP/1.1');
utl_http.set_header(http_req, 'Content-Type', 'text/xml'); -- since we are dealing with plain text in XML documents
utl_http.set_header(http_req, 'Content-Length', length(soap_request));
utl_http.set_header(http_req,
'SOAPAction',
'http://tempuri.org/Clearing_Workflow/Service1/Validate_Mandate'); -- required to specify this is a SOAP communication
utl_http.write_text(http_req, soap_request);
http_resp := utl_http.get_response(http_req);
dbms_output.put_line('HTTP response status code: ' || http_resp.status_code);
dbms_output.put_line('HTTP response reason phrase: ' || http_resp.reason_phrase);
UTL_HTTP.read_raw(http_resp, buff, 32767);
end;
The response gotten from the web service is as below :
open=F, temp=T, length=13256, chunksize=8132, data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
I do not understand what this output actually means as what the webservice returns is meant tio be a XML with a signature tag that contain an image of customers signature.
Please I need help.

Answer 1

Thanks for the responses thus far , but I think i need to properly define my problem so will be able to help me better.
I have a webservice with the definition below :
POST /NigMailService/nigmailservice.asmx HTTP/1.1
Host: 10.2.15.157
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://tempuri.org/GetImageDataTable_HT"
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<GetImageDataTable_HT xmlns="http://tempuri.org/">
<BranchCode>int</BranchCode>
<CustomerNumber>int</CustomerNumber>
<CurrencyCode>int</CurrencyCode>
<LedgerCode>int</LedgerCode>
<SubAccountCode>int</SubAccountCode>
<ChequeNumber>int</ChequeNumber>
<ClientCode>string</ClientCode>
<wantedImageTypes>int</wantedImageTypes>
<wantedImageSize_InPercent>int</wantedImageSize_InPercent>
</GetImageDataTable_HT>
</soap:Body>
</soap:Envelope>
and sample response :
HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
Content-Length: length
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<GetImageDataTable_HTResponse xmlns="http://tempuri.org/">
<GetImageDataTable_HTResult>xmlxml</GetImageDataTable_HTResult>
</GetImageDataTable_HTResponse>
</soap:Body>
</soap:Envelope>
My aim is to write a PL/SQL that will call the webservice and recieve the response which is definately a XML with an image that is meant to be written to a file in PL/SQL.
Please how can i achieve this ?