Json.NET serializeObject putting newline characters into data

Question

I have a ASP.NET Web API REST service running on a server that feeds data back and forth to my Android Apps. I use a lot of Newtonsoft Json with great success but it is causing me a problem on a new method I am writing.

In a nutshell I am reading a large String from my SQL Server DB, putting it into a simple object, serializing it out in a Json string, and posting an HTTP POST response. What is happening is that the serializeObject is inserting newline characters (/n) once every 76 characters into the string.

the following code...

    Logger.log("retPair.publicKey =  " + retPair.publicKey);
    returnString = JsonConvert.SerializeObject(retPair);
    Logger.log("Verify Talker return is " + returnString);

Produces the following two log entries . . .

10/18/2015 3:19:36 PMDBAWP7 retPair.publicKey = MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzQn5Lw2PTlVkSOjg7ycZMVDUmaGYQhVe I82XcheaPDyr16tCp4P2oJCjKlKPeN1v5qN4kR4BKo3xjUwM+BWO6i3mr10C9/mbXUoInVXVODRu lkdIXFPthSkBMytl5jAjaf1Ep4F3Y64WVwYXd9ASYpfNN5FMvxUzYbdkV7QNObsfHkAnr98uamFg SJ0dGJ8svQ1DKiKz4db+zkzalXNHqh7mbV7kxRkT08GlocFEOp/xaLISlrH03CcKozerTbY/NkMx XE7s7+wAuREgjKdNkpjRYUTMdm/QhxcvJf8UU7tE89POHkZ1wghPpAFIJ6kdCVBewrfaJVdcwJk8 WdzzaQIDAQAB

10/18/2015 3:19:36 PMDBAWP7 Verify Talker return is {"phoneKey":"cathyblakely","publicKey":"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzQn5Lw2PTlVkSOjg7ycZMVDUmaGYQhVe\nI82XcheaPDyr16tCp4P2oJCjKlKPeN1v5qN4kR4BKo3xjUwM+BWO6i3mr10C9/mbXUoInVXVODRu\nlkdIXFPthSkBMytl5jAjaf1Ep4F3Y64WVwYXd9ASYpfNN5FMvxUzYbdkV7QNObsfHkAnr98uamFg\nSJ0dGJ8svQ1DKiKz4db+zkzalXNHqh7mbV7kxRkT08GlocFEOp/xaLISlrH03CcKozerTbY/NkMx\nXE7s7+wAuREgjKdNkpjRYUTMdm/QhxcvJf8UU7tE89POHkZ1wghPpAFIJ6kdCVBewrfaJVdcwJk8\nWdzzaQIDAQAB\n"}

BTW, the data is a Public encryption key.

As you can see the second log entry has /n every 76 characters. Researching this problem on the web I see other people have gotten this problem but no one has received a response that eliminated the problem. Formatting.NONE has not effect.

The product version of my Newtonsoft.Json.dll is 4.5.6.14930. Anyone know why this might be happenning. I know I can eliminate the \n in the string but that is my last resort. Thanks, Dean

Just to confirm, retPair.publicKey is a string and not a byte[], correct? — Brian Rogers
– Brian Rogers, Commented Oct 19, 2015 at 0:08

Matt Johnson-Pint · Accepted Answer · 2015-10-18 23:27:10Z

1

As seen in the JSON spec on www.json.org, newlines in a string are encoded as \n when in JSON.

JSON.Net is not introducing newline characters into the output arbitrarily, but rather your original string already has newline characters, so they have to be encoded.

edited Oct 18, 2015 at 23:27

answered Oct 18, 2015 at 23:05

Matt Johnson-Pint

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6 Comments

Dean Blakely Over a year ago

as you can see, there are no newline characters in retPair.publicKey so my original string does not already have newline characters. They are clearly being put there by the serializeObject operation. no?

Matt Johnson-Pint Over a year ago

It's difficult to clearly see, but all the \n characters align exactly with the newlines in the public key you pasted into your question. Either it was there to begin with, or it's a copy/paste artifact and just coincidentally aligns.

Matt Johnson-Pint Over a year ago

Try JsonConvert.SerializeObject(retPair.Replace("\n","")) and see if you get different results. Then you'll know for sure.

Brian Rogers Over a year ago

@MattJohnson I think you meant retPair.publicKey.Replace("\n","").

Brian Rogers Over a year ago

@DeanBlakely I agree with Matt. Most likely something in your code is calling Convert.ToBase64(publicKeyBytes, Base64FormattingOptions.InsertLineBreaks);.

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