Thread: need help urgent

HI
i have no experience working backend side,but now my company asked me to work on backend
so
want to develope a proxy servlet which generates the response header and body in xml and implement
an interface known as session lookup interface where it calls the proxyservlet on to url
get a sessionid from url
generate responses for sessioid in xml
implement a sessionlookup interface which calls the servlet on same url where we got sessionid
validation part is take care by rmi
https://svc.abcdsef.com/auth/mproxy?sessionid=25536637
get sessionid from this url and post back to same url with
HTTP Method: GET

Form/Query Parameters
Name Data Type Req’d Length Description
sessionid String Yes The user’s emeta session id

Preconditions
Type Name Description
param Session-id-required The session id parameter is required.

Responses
Status: HTTP-200 (Okay)
Reason: Success
Response-Headers:
Service-Ident: name-version
Response Body:
<?xml version="1.0" encoding="UTF-8"?>
<credentials>
<session-id>18132681</session-id>
<roles>
<role>SELECTDL</role>
<role>SELECTRT</role>
</roles>
</credentials>

Status: HTTP-412 (Precondition Failed)
Reason: One or more preconditions failed.
Response-Headers:
Service-Ident: name-version
Response Body: (see Common Status Response – type and name attributes given in Precondition section.)

Status: HTTP-500 (Internal Server Error)
Reason: An unexpected error occurred while processing the request
Response-Headers:
Content-Type: text/plain
Service-Ident: name-version
Response Body:
[Error description]
[Optional troubleshooting info]

Note:


Error Codes:

Here are sample errors that should be returned by the service

1. Session id Invalid

<status type="param">
<description>Precondition Failure</description>
<map>
<entry name=”invalid-session-id">
<value>The session id parameter is invalid.</value>
</entry>
</map>
</status>

2. Session id Missing

<status type="param">
<description>Precondition Failure</description>
<map>
<entry name=”session-id-required">
<value>The session id parameter is required.</value>
</entry>
</map>
</status>

3. Service Unavailable

<status type="service">
<description>Service Unavailable</description>
<map>
<entry name=”service-unavailable">
<value>The back end eMeta services are unavailable.</value>
</entry>
</map>
</status>

Notes: