Change api methods to use POST when possible

src/api/api_server.py

@@ -17,6 +17,7 @@ import psutil
 import yaml
 from flask import Flask, request, send_file, after_this_request, Response, redirect, url_for
 from sqlalchemy.orm.exc import DetachedInstanceError
+from werkzeug.exceptions import HTTPException
 
 from src.api.job_import_handler import JobImportHandler
 from src.api.preview_manager import PreviewManager
@@ -306,7 +307,7 @@ def add_job_handler():
     return 'unknown error', 500
 
 
-@server.get('/api/job/<job_id>/cancel')
+@server.post('/api/job/<job_id>/cancel')
 def cancel_job(job_id):
     if not request.args.get('confirm', False):
         return 'Confirmation required to cancel job', 400
@@ -320,7 +321,7 @@ def cancel_job(job_id):
         return "Unknown error", 500
 
 
-@server.route('/api/job/<job_id>/delete', methods=['POST', 'GET'])
+@server.post('/api/job/<job_id>/delete')
 def delete_job(job_id):
     try:
         if not request.args.get("confirm", False):
@@ -616,6 +617,9 @@ def handle_404(error):
 
 @server.errorhandler(Exception)
 def handle_general_error(general_error):
+    if isinstance(general_error, HTTPException):
+        return general_error.description, general_error.code
+
     traceback.print_exception(type(general_error), general_error, general_error.__traceback__)
     err_msg = f"Server error: {general_error}"
     logger.error(err_msg)
@@ -633,7 +637,7 @@ def detected_clients():
     return ZeroconfServer.found_hostnames()
 
 
-@server.get('/api/_debug/clear_history')
+@server.post('/api/_debug/clear_history')
 def clear_history():
     RenderQueue.clear_history()
     return 'success'

src/api/server_proxy.py

@@ -109,6 +109,11 @@ class RenderServerProxy:
         return requests.get(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout,
                             headers={"X-API-Version": str(API_VERSION)})
 
+    def _post(self, payload, timeout=5, **kwargs):
+        from src.api.api_server import API_VERSION
+        return requests.post(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout,
+                             headers={"X-API-Version": str(API_VERSION)}, **kwargs)
+
     # --------------------------------------------
     # Background Updates:
     # --------------------------------------------
@@ -225,10 +230,10 @@ class RenderServerProxy:
                 return response
 
     def cancel_job(self, job_id, confirm=False):
-        return self.request_data(f'job/{job_id}/cancel?confirm={confirm}')
+        return self._post(f'job/{job_id}/cancel', params={'confirm': confirm})
 
     def delete_job(self, job_id, confirm=False):
-        return self.request_data(f'job/{job_id}/delete?confirm={confirm}')
+        return self._post(f'job/{job_id}/delete', params={'confirm': confirm})
 
     def send_subjob_update_notification(self, parent_id, subjob):
         """