Fix up password reset template config names (#5863)

Fixes #5833

The emailconfig code was attempting to pull incorrect config file names. This corrects that, while also marking a difference between a config file variable that's a filepath versus a str containing HTML.

changelog.d/5863.bugfix

@@ -0,0 +1 @@
+Fix Synapse looking for config options `password_reset_failure_template` and `password_reset_success_template`, when they are actually `password_reset_template_failure_html`, `password_reset_template_success_html`.

synapse/config/emailconfig.py

@@ -132,21 +132,21 @@ class EmailConfig(Config):
             self.email_password_reset_template_text = email_config.get(
                 "password_reset_template_text", "password_reset.txt"
             )
-            self.email_password_reset_failure_template = email_config.get(
-                "password_reset_failure_template", "password_reset_failure.html"
+            self.email_password_reset_template_failure_html = email_config.get(
+                "password_reset_template_failure_html", "password_reset_failure.html"
             )
             # This template does not support any replaceable variables, so we will
             # read it from the disk once during setup
-            email_password_reset_success_template = email_config.get(
-                "password_reset_success_template", "password_reset_success.html"
+            email_password_reset_template_success_html = email_config.get(
+                "password_reset_template_success_html", "password_reset_success.html"
             )
 
             # Check templates exist
             for f in [
                 self.email_password_reset_template_html,
                 self.email_password_reset_template_text,
-                self.email_password_reset_failure_template,
-                email_password_reset_success_template,
+                self.email_password_reset_template_failure_html,
+                email_password_reset_template_success_html,
             ]:
                 p = os.path.join(self.email_template_dir, f)
                 if not os.path.isfile(p):
@@ -154,9 +154,9 @@ class EmailConfig(Config):
 
             # Retrieve content of web templates
             filepath = os.path.join(
-                self.email_template_dir, email_password_reset_success_template
+                self.email_template_dir, email_password_reset_template_success_html
             )
-            self.email_password_reset_success_html_content = self.read_file(
+            self.email_password_reset_template_success_html_content = self.read_file(
                 filepath, "email.password_reset_template_success_html"
             )
 

synapse/rest/client/v2_alpha/account.py

@@ -282,13 +282,13 @@ class PasswordResetSubmitTokenServlet(RestServlet):
                     return None
 
             # Otherwise show the success template
-            html = self.config.email_password_reset_success_html_content
+            html = self.config.email_password_reset_template_success_html_content
             request.setResponseCode(200)
         except ThreepidValidationError as e:
             # Show a failure page with a reason
             html = self.load_jinja2_template(
                 self.config.email_template_dir,
-                self.config.email_password_reset_failure_template,
+                self.config.email_password_reset_template_failure_html,
                 template_vars={"failure_reason": e.msg},
             )
             request.setResponseCode(e.code)