Improve endpoint detection

[SimonAdrian]

Function extract_endpoint_part() in rst_entry.py only gets as input the single line in which keyword @RequestMapping was found. Specification of endpoint can span over multiple lines, see https://github.com/geonetwork/geonetwork-microservices/blob/main/modules/services/searching/src/main/java/org/fao/geonet/searching/controller/MainSearchController.java

[bakhtos]

Chiichen/springcloud-lab crashes due to this:

Traceback (most recent call last):
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/code2DFD.py", line 115, in <module>
    cli_invocation()
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/code2DFD.py", line 111, in cli_invocation
    perform_analysis()
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/core/dfd_extraction.py", line 74, in perform_analysis
    codeable_models, traceability_content = DFD_extraction()
                                            ^^^^^^^^^^^^^^^^
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/core/dfd_extraction.py", line 111, in DFD_extraction
    new_information_flows = tech_sw.get_information_flows(dfd)
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/core/technology_switch.py", line 43, in get_information_flows
    eval(com_tech[1]).set_information_flows(dfd)
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/technology_specific_extractors/resttemplate/rst_entry.py", line 22, in set_information_flows
    incoming_endpoints = get_incoming_endpoints(dfd)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/technology_specific_extractors/resttemplate/rst_entry.py", line 72, in get_incoming_endpoints
    endpoint_part = extract_endpoint_part(line)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/abakhtin22/Documents/TempNet/code2DFD/technology_specific_extractors/resttemplate/rst_entry.py", line 105, in extract_endpoint_part
    endpoint_part = line.split('\"')[1]
                    ~~~~~~~~~~~~~~~~^^^
IndexError: list index out of range

[bakhtos]

Same error for Microservice-API-Patterns/LakesideMutual

[bakhtos]

Same error SasanLabs/VulnerableApp