I need some help when I try to input backslash in input field then in request it is sending double backslash and I am not getting why is it behaving like this. Please let me know how to fix this issue.enter image description here
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I am working on macOS, not iOS, XCode 11.
My app allows in a specific location to enter text. This text can be anything. Once done it exports a csv which will be passed to an external process i cannot influence.
The issue: the external process uses semicolon ";" as a separator (csv is separated differently). If the user writes semicolon the external process will fail.
If I manually add an escaping backslash before each semicolon to the csv and then pass it to the external app it works.
What I need: having each semicolon escaped with ONE backslash in the final csv
What I tried
Escaping the whole text with quotation marks - fail
Escaping semicolons in objective-c before writing csv by trying
stringByReplacingOccurrencesOfString (look for #";" replace with #"\;" - compiler throws a warning that escape character is unknown - fail
Appreciate any help
UPDATE:
I also tried to set a double backslash like #Corbell mentioned but this leads in a double backslash in the exported CSV -> fail
I also tried to set a single backslash by using its unicode character:
[NSString stringWithFormat:#"%C;",0x5C]; --> "\\;"
Also failed and produces two backslashes in the final CSV (where i need ONE only).
In your stringByReplacingOccurencesOfString call, second parameter, try escaping your backslash with a backslash to make it a literal character to insert, i.e. #"\\;" - otherwise the compiler thinks you're trying to specify #"\;" as an escape sequence (backslash-semicolon) which is invalid.
Solved. It was the CSV Parser that added additional escaping characters. Once solved that it worked like a charm.
i just want to know it there is a way to pass some parameters with process start. I know it can be done with some spaces, but i want to send an adress and full name, both of them have their own spaces, and i need to send them as just 1 parameter.
How would you do it if you were typing the commandline into a console window? You'd wrap each parameter in double quotes, right? It is exactly the same when using Process.Start. In VB.NET, you denote a literal double quote with two double quotes in a String, e.g.
Process.Start("myApp.exe", "firstParam ""second param"" thirdParam")
That would be equivalent to typing this into a console window:
myApp.exe firstParam "second param" thirdParam
We are getting a value from a DB that contains a backslash (\). After going through DataWeave, we get 2 backslashes. Here it is how it looks:
How can we have only one backslash in the end? Can we use the replace function somehow? I tried and could not make it work.
I believe the reason why you see two backslashes is because backslash is a reserved character (see JSON spec) therefore DataWeave is automatically escaping the backslash, which is necessary so not to have your DB value corrupted.
In my opinion the double backslash is not a problem. You should get the right content upon consuming the JSON object.
You could try to put in an escape character of your choice
Eg: %output application/csv escape = " "
This should ideally replace "/" with " ".
Hope this helps.
I am trying to take a string like "Hello my name is Nick" and transform it to "Hello+my+name+is+Nick" to be passed through a URL. This would be easily done by replacing all the spaces with a + char however I also need to replace all special characters (. , ! &) with their ASCII values. I have searched the net but cannot find anything. I wonder if anyone knows of existing code to do this as its a fairly common task?
I think you're looking for this: HttpUtility.UrlEncode Method (String)
Handles non-URL compliant characters and spaces.
I am encoding white spaces in a string using
[#"iPhone Content.doc" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]
in SKPSMTP message sending. But while receiving mail at attachments place I am getting the name iPhone%20Content.doc - instead of a space it shows %20. How can this be avoided / correctly encoded?
If you're doing stringByAddingPercentEscapesUsingEncoding then you're going to get percent signs in your result string... You can either use something different, or go back through and remove the percent signs later.
From the doc:
stringByAddingPercentEscapesUsingEncoding: Returns a representation of
the receiver using a given encoding to determine the percent escapes
necessary to convert the receiver into a legal URL string.
aka, "this method adds percent signs". If you want to reverse this process, use stringByReplacingPercentEscapesUsingEncoding
Just a side note, %20 is there because the hex representation of the space character is 20 and the % sign is an escape. You only need to do this for URLs, as they disallow the use of whitespace characters.
I got solution for my question. Actually am missed to set the "" to a string.
Of course the remote receiver can not accept the url with whitespace, so we must convert the URL address using the stringByAddingPercentEscapesUsingEncoding function.
This function replaces spaces in the URL expression with %20. It is especially useful when the URL contains non-ascii characters - you have use the function to percent-escape the URL so that the remote server can accept your request.