Get data with restful webservices from Oracle PL/SQL - oracle

I want to get data from webservices from oracle database.
But I'm looking for it unfortunately I can't anything .
Please give me some hints.I want to accesses it with username and password in pl/sql code.
How can I do it?
Thank you..

I solve it like following code.I think it will be useful .
declare
t_http_req utl_http.req;
t_http_resp utl_http.resp;
t_request_body varchar2(30000);
t_respond varchar2(30000);
t_start_pos integer := 1;
t_output varchar2(2000);
begin
/*Construct the information you want to send to the webservice.
Normally this would be in a xml structure. But for a REST-
webservice this is not mandatory. The webservice i needed to
call excepts plain test.*/
t_request_body := 'the data you want to send to the webservice';
/*Telling Oracle where the webservice can be found, what kind of request is made
and the version of the HTTP*/
t_http_req:= utl_http.begin_request( 'http://urlofwebservice'
, 'GET'
, 'HTTP/1.1');
/*In my case the webservice used authentication with a username an password
that was provided to me. You can skip this line if it's a public webservice.*/
utl_http.set_authentication(t_http_req,'username','password');
/*Describe in the request-header what kind of data is send*/
utl_http.set_header(t_http_req, 'Content-Type', 'text/xml charset=UTF-8');
/*Describe in the request-header the lengt of the data*/
utl_http.set_header(t_http_req, 'Content-Length', length(t_request_body));
/*Put the data in de body of the request*/
utl_http.write_text(t_http_req, t_request_body);
/*make the actual request to the webservice en catch the responce in a
variable*/
t_http_resp:= utl_http.get_response(t_http_req);
/*Read the body of the response, so you can find out if the information was
received ok by the webservice.
Go to the documentation of the webservice for what kind of responce you
should expect. In my case it was:
<responce>
<status>ok</status>
</responce>
*/
utl_http.read_text(t_http_resp, t_respond);
dbms_output.put_line(t_respond);
/*Some closing?1 Releasing some memory, i think....*/
utl_http.end_response(t_http_resp);
end;

You might want to look into the UTL_HTTP package

Related

How to terminate a POST web service call - ORDS

Please excuse my ignorance as I am a total beginner.
I have created a basic RESTful Web Services Using PL/SQL, sample code below(which works perfectly fine)
ords.define_template(
p_module_name => 'restDemo',
p_pattern => 'updateClient');
ords.define_handler(
p_module_name => 'restDemo',
p_pattern => 'updateClient',
p_method => 'POST',
p_source_type => ords.source_type_plsql,
p_source => 'declare
w_clob clob := :body_text;
begin
ws.ws_interface.update_client(w_clob);
exception
when others then
package.ws_interface.g_result_rec.result_message := SQLERRM;
end;');
When ws_interface.update_client is initiated via the post request, in the initialization of ws_interface package, I am calling a routine thats determines if the client can be updated or not (based on access of the user logged in to the DB).
If the user does not have access to execute the updateClient service - I want to terminate the service call, which I have no idea on how to go about do this.
So my question is:
How do I go about terminating the current active updateClient webservice call ?
In your ws_interface package, if the client can not be updated, then you just need to return so that the PL/SQL block in the POST definition will complete. Your code can look something like this:
---Beginning of package
...
procedure update_client (some_clob clob) is
begin
--The client can not be updated so do no more processing.
if can_update_client = false then
--Some sort of error message could also be added here
return;
end if;
--Rest of processing for updating the client
end;
...
---End of package

REST service works via Postman, not using PL/SQL

I am new to programming with REST services, and I'm hitting a bit of a wall.
I need to be able to access a specific set of REST services from Oracle PL/SQL. The guy who knows about the services knows nothing about PL/SQL. Bridging the gap is proving difficult.
This, in POSTMAN, works:
(Apparently I'm too new to the site to post screen shots)
Action: POST
URL: http://dev-osb.sh.com/LDAP/LDAPVndrMgmt
Authorization: basic, username & password
Body: Raw, JSON
{
"requestType": "listAccounts",
"uid": "FTTestDlete100",
"vendorRole": "FreightTrackingLATA" }
And I get back all the results I expected in JSON format.
This PL/SQL should (as near as I can tell) do the same, but it doesn't.
DECLARE
l_clob clob;
l_json clob;
BEGIN
--create the JSON request body
apex_json.initialize_clob_output();
apex_json.open_object();
apex_json.write('requestType', 'listAccounts');
apex_json.write('uid', 'FTTestDlete100');
apex_json.write('vendorRole', 'FreightTrackingLATA');
apex_json.close_all();
l_json := apex_json.get_clob_output();
apex_json.free_output();
l_clob := apex_web_service.make_rest_request(
p_url => 'http://dev-osb.sh.com/LDAP/LDAPVndrMgt',
p_username => 'theUserName',
p_password => 'thepassword',
p_http_method => 'POST',
p_parm_name => apex_util.string_to_table('Content-Type'),
p_parm_value => apex_util.string_to_table('application/json'),
p_body => l_json
);
dbms_output.put_line(to_char(l_clob));
END;
As shown I get "{ "errorMessage" : "No acceptable request representation was found" }"
If I remove the /LDAP/LDAPVndrMgt portion from the URL, I get some HTML code saying:
**Error 404--Not Found
The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.**
So - something isn't working right. It's like the resource part (starting at /LDAP...) can't be concatenated onto the URL in the PL/SQL function, but without it I get a 404. I'm hoping to avoid having to go the UTL_HTTP route. Any suggestions?
Breakthrough - I found out that my PL/SQL was sending what should have been headers as parameters.
Here's the working code:
DECLARE
l_clob clob;
l_json clob;
BEGIN
apex_web_service.g_request_headers(1).NAME := 'Content-Type';
apex_web_service.g_request_headers(1).VALUE := 'application/json';
--create the JSON request body
apex_json.initialize_clob_output();
apex_json.open_object();
apex_json.write('requestType', 'listAccounts');
apex_json.write('uid', 'FTTestDlete100');
apex_json.write('vendorRole', 'FreightTrackingLATA');
apex_json.close_all();
l_json := apex_json.get_clob_output();
apex_json.free_output();
l_clob := apex_web_service.make_rest_request(
p_url => 'http://dev-osb.sh.com/LDAP/LDAPVndrMgt',
p_username => 'theUserName',
p_password => 'thepassword',
p_http_method => 'POST',
p_body => l_json
);
dbms_output.put_line(to_char(l_clob));
END;

Are BING geocoding & Google geocoding a web-service, or web-api?

I want to pull just the latitude and longitude (for some addresses in oracle table) from BING or Google. I want to do this from stored procedure. I tried to do this using the UTL_DBWS package, but I am not able to form a complete call as I am missing details like 'operation', 'input parameter request format' etc. I couldn't find wsdl file for both the geocoding services. So are these services actually a web-api or web-service? What is the best way to call these services from oracle stored-proc?
You can check this example which uses utl_http to get a good idea on how you can do it
Couple of things you need to take care
1)You need direct internet connection from database server
2)You need to edit your database ACL policy for this to work
3)You need to escape "&" symbol in the URL you use for searching
4)You need to validate the SSL certificate using Oracle wallet
The ACL Example
BEGIN
--You need DBA to execute this function where www.xml is the ACL Name
--SCOTT is the schemaname,my.oracle.com is the host to access the webpage
DBMS_NETWORK_ACL_ADMIN.CREATE_ACL(acl => 'www.xml',
description => 'WWW ACL',
principal => 'SCOTT',
is_grant => true,
privilege => 'connect');
DBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE(acl => 'www.xml',
principal => 'SCOTT',
is_grant => true,
privilege => 'resolve');
DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL(acl => 'www.xml',
host => 'my.oracle.com');
END;
/
COMMIT;
you can add additional Host names for accessing the internet to the ACL www.xml like the below
BEGIN
DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL(acl => 'www.xml',
host => 'www.google.co.in');
END;
/
COMMIT;
here is an example of latitude and longitude search using google
declare
httpuri HttpUriType;
x clob;
address VARCHAR2(32000):='New York';
lat_long_value VARCHAR2(4000);
begin
UTL_HTTP.set_transfer_timeout(60); --set timeout to 60 seconds
httpuri := HttpUriType('http://www.google.co.in/search?q=find+latitude+and+longitude+of+' ||address||'&'||'ie=utf-'||'8&'||'oe=utf-'||'8&'||'aq=t'||'&'||'rls=org.mozilla'||':'||'en-US'||':'||'official'||'&'||'client=firefox-a');
x := httpuri.getclob();
lat_long_value := regexp_substr(x, '<div class="_Xj">(.+)</div>');
if lat_long_value is not null then
select regexp_replace(lat_long_value,
'<div class="_Xj">(.+)</div>',
'\1')
into lat_long_value
FROM dual;
end if;
dbms_output.put_line(lat_long_value);
end;
If you get the error that
Ora-29024 Certification validation failure
Kindly follow the steps required to add the google certificate to Oracle wallet here
Finally you get the output is
40.7127° N, 74.0059° W

Delphi TDBXTransaction 'Invalid transaction Object'

1st off I am new to Delphi so this may be a "mundane detail" that's being over looked. [sorry in advance]
I am getting an 'Invalid Transaction Object' error when I attempt to run a transaction through a datasnap server connected to an Oracle 11g DB.
Due to the system details and the companies business plan we have elected not to use ClientDataSets to handle our transactions. Instead we are attempting to make the Snap server very generic and only handle data access by receiving queries and returning native types.
With that being said here is some sample code that is giving me fits:
function TSnapMethods.TransUpdate: boolean;
var
dbx: TDBXTransaction;
params:TParams;
begin
SqlCon.Open;
dbx := SQLCon.DBXConnection.BeginTransaction(TDBXIsolations.ReadCommitted);
try
params:= TParams.Create(self);
with Params.AddParameter do
begin
name:= 'param';
DataType:= ftWideString;
ParamType:= ptInput;
asString:= 'Bugsville';
end;
with Params.AddParameter do
begin
name:= 'var';
DataType:= ftWideString;
ParamType:= ptInput;
asString:= 'ZZZTOP';
end;
sqlcon.Execute('Update Name set City=:param Where Abrv=:var',params);
SQLcon.CommitFreeAndNil(dbx);//Breaks here...
result:= true;
except
Sqlcon.RollbackFreeAndNil(dbx);//Breaks here also...
result:= false;
end;
end;
By calling SQLCon.DBXConnection.BeginTransaction(), you're bypassing the setting up of internal TTransactionItem which is checked when the transaction is committed when you call SQLcon.CommitFreeAndNil() on the SQLConnection object. Notice that you're starting the transaction on the DBXConnection object but not committing it likewise.
Replace
SQLCon.DBXConnection.BeginTransaction()
with
SQLCon.BeginTransaction()
From another source I got this helpful information:
http://codeverge.com/embarcadero.delphi.ide/record-not-found-or-changed-by-another/1061559
For start transaction:
transaction:=Datamodule.SqlConection.BeginTransaction(TDBXIsolations.ReadCommitted);
For commit:
DataModule1.SqlConection.CommitFreeAndNil(Transacao);
To rollback:
DataModule1.SqlConection.RollbackIncompleteFreeAndNil(Transacao)
And use
RollbackIncompleteFreeAndNil
instead
RollbackIncompleteFreeAndNil
like referenced by:
http://docwiki.embarcadero.com/Libraries/Tokyo/en/Data.SqlExpr.TSQLConnection.RollbackIncompleteFreeAndNil
Please try this and report the results.

Incorrect Input/Doc URL Error

I have the following code which connects to a oracle database via soap, creates an XML Blob and returns it to the screen.
I am receiving the following error, and cannot figure out why.
array(3) {
["faultcode"]=>
string(11) "soap:Client"
["faultstring"]=>
string(22) "Error processing input"
["detail"]=>
array(1) {
["OracleErrors"]=>
string(39) "
Incorrect Input Doc/URL
"
}
}
I am using the following function to call a stored procedure.
function getUsersData(){
$xmlfunc = 'GETUSERS';
$pkg = 'JSON_EXPORTS';
$inparam = array("SESSIONHASH-VARCHAR2-IN" => $_SESSION['sessionhash']);
$outparam = array("USERSDATA-XMLTYPE-OUT");
$oradb = oradb::getconnection();
$oradb->newxml($xmlfunc,$pkg,$inparam,$outparam);
$result = $oradb->getxml(false,false,false,true);
print_r($result);
}
This is the stored procedure I am calling:
CREATE OR REPLACE PACKAGE BODY vivouser.json_exports IS
-- #Oracle bexV2
PROCEDURE getusers(sessionhash IN VARCHAR2,
usersdata OUT XMLTYPE)
IS
p_companyid number;
p_storegroupid number;
p_userid number;
BEGIN
bexcore.checksessionid(sessionhash, p_companyid, p_storegroupid, p_userid);
usersdata := bexcore.CreateXMLData(
'select userid,
tbu.companyid,
tbu.firstname,
tbu.middlename,
tbu.lastname,
tbu.gender,
tbu.payrollnumber,
tbu.ismanager,
tpt.description,
tpt.wagerate
from tbuser tbu
left join tbposition tbp using (USERID)
left join tbpositiontype tpt using (POSITIONTYPEID);'
);
END getusers;
END json_exports;
Also, please note: $_SESSION['sessionhash'] is proven to be a logical hash value. All other soap calls using this format function as expected. Bexcore.checksessionid is also proven to be valid, and not the cause of this error, as is bexcore.createXmlData (they are each used in thousands of other cases in the same way and run as expected.)
The problem I was having, was that the user accessing the database did not have permissions set to allow calling the requested packages.
use
grant all on <packagename> to <user>;
to solve this problem.

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