Close #11 : Make the signature optionnal, lint file

README.md

@@ -67,6 +67,18 @@ Your contributions are very much welcome ! You can either request an account on
 
 Please also say if you had a printer to test your code, and which printer you've been using.
 
+### Linting
+
+If you want to contribute code, please make sure to lint the project before commiting. This helps the code keep a general structure, and avoids some commons erros and mistakes.
+
+To do so, you can run the following command :
+
+```
+black src/
+```
+
+Beware that this command *will* re-write files, so doing `git add <file>` and then `black src/` and then `git diff` to see what the linter has done is a good idea.
+
 ## Screenshots
 
 ![](src/static/images/homepage.png)

configuration/config.toml

@@ -1,5 +1,8 @@
 # Configuration file the LittlePrynter
 
+[defaults]
+signature = "Anonymous"
+
 # Printer settings
 [printer]
 vendor_id = 0x04b8

src/main.py

@@ -82,6 +82,7 @@ except FileExistsError:
     app.logger.debug("Directory %s already exists.", UPLOAD_FOLDER)
 except PermissionError:
     app.logger.error("Permission denied: Unable to create %s", UPLOAD_FOLDER)
+    exit(77)
 
 # Output the config file
 if os.getenv("LIPY_DEBUG") is True:
@@ -165,14 +166,20 @@ def api_print_sms():
     app.logger.debug("Printing an sms")
     try:
         txt = request.form["txt"]
-        sign = request.form["signature"]
     except werkzeug.exceptions.BadRequestKeyError as e:
-        app.logger.error(
+        app.logger.error("Whoops, we are missing the txt input field. : %s ", str(e))
-            "Whoops, no forms submitted or missing signature : %s ", str(e)
-        )
         flash("Whoops, no forms submitted or missing signature : %s", str(e))
         return redirect(url_for("index"))
 
+    try:
+        # comment: We try to get a signature
+        sign = request.form["signature"]
+    except werkzeug.exceptions.BadRequestKeyError as e:
+        app.logger.warning(
+            "No signature found for this print, using default signature.", str(e)
+        )
+        sign = configuration_file["defaults"]["signature"]
+
     web.print_sms(txt, sign)
     return redirect(url_for("index"))
 
@@ -184,11 +191,13 @@ def api_print_image():
     app.logger.debug("Printing an image")
 
     try:
+        # comment: We try to get a signature
         sign = request.form["signature"]
-    except Exception as e:
+    except werkzeug.exceptions.BadRequestKeyError as e:
-        app.logger.error("Whoops, no forms submitted or missing signature : %s", str(e))
+        app.logger.warning(
-        flash("Whoops, no forms submitted or missing signature : %s ", str(e))
+            "No signature found for this print, using default signature.", str(e)
-        return redirect(url_for("index"))
+        )
+        sign = configuration_file["defaults"]["signature"]
 
     if request.method == "POST":
         # check if the post request has the file part