Abstract Web Source - shef assumptions too rigid to open URL

[jbatterman]

Describe the bug
Attempting to open a URL through OpenDCS abstractweb source formatted as shefit does not work but does work for shef.e formatted pages. OpenDCS will open the URL if shefmode=False or if shefmode=True. If header=shef in the source, it will attempt to read the URL and error out because of the formatting. If header=other in the source, it will not open the URL.

To Reproduce
Steps to reproduce the behavior:

1. Add new abstractweb source with URL = https://www.ameren.com/api/ameren/Hydroelectric/getDailyShefitGMTReport?interval=1h

2. Set shefmode = True or False

3. Set header = shef

4. Run rs on source and see log.

5. Error as follows:
   INFO 12/18/24 19:06:40 WebDataSource Opening 'https://www.ameren.com/api/ameren/Hydroelectric/getDailyShefitGMTReport?interval=1h'
   DBG3 12/18/24 19:06:42 scanForMessage oneMessageFile=true, mediumId=null
   DBG3 12/18/24 19:06:42 SHEF Station name='BAGLAMUE20241217060000'
   DBG3 12/18/24 19:06:42 SHEF Station Time='0'
   WARNING 12/18/24 19:06:42 Invalid time-zone '0' in SHEF message ignored, using UTC.
   DBG3 12/18/24 19:06:42 SHEF Time Zone = UTC
   DBG3 12/18/24 19:06:42 SHEF Header Length set to 29
   FAILURE 12/18/24 19:06:42 StreamDataSource Failed to parse header: decodes.datasource.HeaderParseException: Invalid date field in SHEF message '0' -- message file is invalid.
   DBG3 12/18/24 19:06:42 scanForMessage oneMessageFile=true, mediumId=null
   WARNING 12/18/24 19:06:42 RoutingSpec(Ameren-WebService) WebAbstractDataSource cannot open 'https://www.ameren.com/api/ameren/Hydroelectric/getDailyShefitGMTReport?interval=1h': decodes.datasource.D
   ataSourceEndException: Stream EOF.

6. Go back to source and set header = other.

7. Run rs on source and see error.
   WebAbstractDataSource cannot open 'https://www.ameren.com/api/ameren/Hydroelectric/getDailyShefitGMTReport?interval=1h': java.lang.NullPointerException
   java.lang.NullPointerException
   at decodes.db.TransportMedium.makeTmKey(TransportMedium.java:332)
   at decodes.db.PlatformList.findPlatform(PlatformList.java:228)
   at decodes.db.PlatformList.getPlatform(PlatformList.java:154)
   at decodes.datasource.StreamDataSource.makePlatformAssociation(StreamDataSource.java:637)
   at decodes.datasource.StreamDataSource.getRawMessage(StreamDataSource.java:552)
   at decodes.datasource.WebAbstractDataSource.getRawMessage(WebAbstractDataSource.java:209)
   at decodes.routing.RoutingSpecThread.run(RoutingSpecThread.java:435)

Expected behavior
Expect to be able to open and parse the URL as plain text or have more flexible shef assumptions so the URL can be opened.

Desktop/ServerSide (please complete the following information):

• OS: Windows client v7.0.1
• Server: v6.8