• 0

[C#] Am I missing a pitfall with base64 encode sending?


Question

I am always learning different parts of the C# language b/c lets face it, it's a lot of fun :). I've decided to configure my wcf service as a rest service which supports json request/response instead of xml. All has gone well and I can serialize/deserialize my messages into complex classes so far, unless I send a bunch of data in them. I've tried to change my readerQuotas, etc, etc but everytime I try to make a call it says "Error: Bad Data". I know the service works because I can call simple functions and pass data to/from the service. But if I pass a class with 3 byte[] properties each 128 bytes in length it fails. If I pass the same class with each byte[] param with 3 bytes of data it goes through (I base64 encode each complex class after serializing them). Here is my example code:

This example passes and goes through:

GetTestSalesRequest req = new GetTestSalesRequest()
			{
				CurrentTest = new byte[] { 1 },
				CurrentMTest = new byte[] { 4 },
				UserName = this.gl_userName,// <---- is a string
				UserPwd = new byte[] { 2 }
			};

string test = await this.gl_client2.TestFunc(req);
			System.Diagnostics.Debug.WriteLine("Testtion: {0}", test);

This example fails.

GetTestSalesRequest req = new GetTestSalesRequest()
			{
				CurrentTest = CryptographicEngine.Encrypt(keySvr, Encoding.UTF8.GetBytes(test1.ToString()).AsBuffer(), null).ToArray(), // <---- is a byte[]
				CurrentMTest = CryptographicEngine.Encrypt(keySvr, Encoding.UTF8.GetBytes(test2.ToString()).AsBuffer(), null).ToArray(), //<---- is a  byte[]
				UserName = this.gl_userName,// <---- is a string
				UserPwd = this.gl_userPwd // <--- is a byte[]
			};

string test = await this.gl_client2.TestFunc(req);
			System.Diagnostics.Debug.WriteLine("Testtion: {0}", test);

public async Task<string> TestFunc(GetTestSalesRequest request)
		{

string resBody = null;
			byte[] testStr = Encoding.UTF8.GetBytes(WebHelperClass.SerializeJSONObj<GetTestSalesRequest>(request));
			string addr = string.Format("{0}/TestFunc/{1}", this.gl_baseAddr, Convert.ToBase64String(testStr));
			WebRequest req = WebRequest.Create(addr);
			HttpWebResponse res = await req.GetResponseAsync() as HttpWebResponse;
			if (res.StatusCode == HttpStatusCode.OK)
			{
				using (Stream stream = res.GetResponseStream())
				{
					using (StreamReader sr = new StreamReader(stream))
					{
						resBody = sr.ReadToEnd();
						sr.Dispose();
					}
				}
			}
			return resBody;
}

Is there a pitfall I'm going into here? What am I missing that is really obvious because this has to be possible to be done.

10 answers to this question

Recommended Posts

  • 0

Not really strong with debugging other peoples code.. But.. have you tried:

1) Sending the same data but un-encrypted

2) Using AsciiEncoding.Ascii instead of Encoding.UTF8 for the base64 encode?

3) It looks like you are just using the CryptographicEngine, that won't base64 it, have you tried just a plain-jane base64 encode?

4) You pass in a few variables, are you sure they are all initialized correctly?

  • 0

Well basically I'm just taking the json string (that was created by serializing the complex class) in TestFunc and base64 encoding it to send it across to the rest service so I don't have a long query string similar to /TestFunc/{[80,10,01,01,30,10,10], "test":"etc"}. So I am base64 encoding the whole thing then decoding it on the rest service side. If I send the class with only have small amounts of byte data it goes through just fine. If I send each byte[] with having 128 different indexes each then it fails. Ingramator which files do you want? The debugger just outputs saying "The remote server returned an error: (400) Bad Request."

System.Net.WebException was unhandled by user code

HResult=-2146233079

Message=The remote server returned an error: (400) Bad Request.

Source=System

StackTrace:

at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)

at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()

at TestSaleStoreApp.TestSaleRestSvcClient.<TestFunc>d__a.MoveNext() in c:\Users\User\Documents\Visual Studio 2012\Projects\TestSaleStoreApp\TestSaleStoreApp\TestSaleRestSvcClient.cs:line 50

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()

at TestSaleStoreApp.MainUserPg.<initSettings>d__16.MoveNext() in c:\Users\User\Documents\Visual Studio 2012\Projects\TestSaleStoreApp\TestSaleStoreApp\MainUserPg.xaml.cs:line 524

InnerException:

If you need more info let me know :) I'm stumped on this one. As for the ASCII I haven't tried that yet I'll look into it later today but I'm suspecting it has to do with the length of the content (which I've changed the readerQuota settings).

I also really appreciate the help so far guys!

  • 0

It's quite possible you're just sending too much data via the query string, why aren't you just sending it as the request body instead?

base64 makes the content larger, and you don't need to do it with text (like JSON).

  • 0

@The_Decryptor b/c I'm new to using Rest services I'm used to using SOAP :) I'll look into that thanks.

EDIT: My url looks like this:

localhost:8733/Design_Time_Addresses/TestSaleRestSvc/Service1/TestFunc/eyJDdXJyZW50Q29vcmRzTGF0IjpbMiwzLDRdLCJDdXJyZW50Q29vcmRzTG9uZyI6WzMsNCw1XSwiVXNlck5hbWUiOiJyeWFuIiwiVXNlclB3ZCI6WzFdfQ==&pwdKey=Aw==&latKey=JbU2hfwNBi1vHZxH5OnUcKabsT1kx16jqn3BAxLDXPTCHbyIlDyPOoK0NNQVSLmaOD5x1bjzipTM9VJOaQgTIgjmqNtX+l9Jq2EeetSQI58RhCwUFRQGOpKaLEJ03JeZ5UjD3rTzm2HFr5P0SvQBYBsgLB9W1je3PPoD28Ro7IU=&longKey=AQ=="]localhost:8733/Design_Time_Addresses/TestSaleRestSvc/Service1/TestFunc/eyJDdXJyZW50Q29vcmRzTGF0IjpbMiwzLDRdLCJDdXJyZW50Q29vcmRzTG9uZyI6WzMsNCw1XSwiVXNlck5hbWUiOiJyeWFuIiwiVXNlclB3ZCI6WzFdfQ==&pwdKey=Aw==&latKey=JbU2hfwNBi1vHZxH5OnUcKabsT1kx16jqn3BAxLDXPTCHbyIlDyPOoK0NNQVSLmaOD5x1bjzipTM9VJOaQgTIgjmqNtX+l9Jq2EeetSQI58RhCwUFRQGOpKaLEJ03JeZ5UjD3rTzm2HFr5P0SvQBYBsgLB9W1je3PPoD28Ro7IU=&longKey=AQ==

  • 0

Hmm it's always to debug without having it in front of you but I can try and point you in the right direction! :) If its working with smaller data samples it may be that you're [trying to encode an unsupported data type]/[base64 doesn't know what to encode so its sending invalid data] but I can't tell from the log there. The most common problem I find is that the data buffer is not being completely filled or filled correctly so I'd investigate that first! Enable tracing first, instructions here http://msdn.microsoft.com/en-us/library/ms733025.aspx :p then test and it will show you exactly where the problem is occurring. Hope this helps, good luck with the project mate!

  • 0

Writing the object to the body stream and changing the parameter type of the service to the complex object instead of a string made it work for some reason. REST is more of a pain learning how to use then SOAP that is for sure :)

  • 0

So I want to take this time to thank everyone who helped me. You guys are all great assets to this community and I hope I can give back one day by finding other questions I can answer in this forum and post my 2 cents on the subject (you guys are just too quick it seems most of the time and say what I would say :) ). +1 to you all and I hope you have a good holiday.

This topic is now closed to further replies.
  • Posts

    • Patch My PC - Home Updater 5.2.3.0 by Razvan Serea Patch My PC Free is a reliable tool which can quickly check your PC for outdated software. The supported third-party programs include a large number of widely-used applications, including Adobe Reader, Mozilla Firefox, Java, 7-Zip, BleachBit, Google Chrome and many more. Patch My PC Home updater features: Updates over 500 common apps check including portable apps Ability to cache updates for use on multiple machines No bloatware during installations Applications install/update silently by default no install wizard needed Optionally, disable silent install to perform a manual custom install Easy to use user interface Change updated and outdated apps color for color blindness Option to automatically kill programs before updating it Create a baseline of applications if installing on new PC’s Quickly uninstall multiple programs Scan time is usually less than 1 second Set updates to happen on a schedule Skip updates for any application you don’t want to update Suppresses restarts when performing application updates Patch My PC - Home Updater 5.2.3.0 changelog: Startup Manager New tab to manage which apps launch at startup. This helps speed up your boot time and gives you control over what runs in the background. Generate Diagnostic ZIP You can now create a diagnostic ZIP file from the About page. This helps if you need to send logs on our support forum for Home Updater. Remove Portable Apps Right-click any portable app in the App Catalog or Uninstaller page to remove it directly. Applications Added FFmpeg (Full Shared) – Portable Fing G-Helper – Portable IntelliJ IDEA Community Edition K-Lite Basic Codec Pack K-Lite Full Codec Pack K-Lite Standard Codec Pack KeePass Password Safe v1 LibreOffice Help Pack MemTest86 – Portable Nexus Vortex Nvidia Profile Inspector – Portable Pale Moon – Portable ViVeTool – Portable WinCDEmu Windows PC Health Check Wise Video Converter Applications Removed Driver Easy Download: Patch My PC 5.2.3.0 | 54.8 MB (Freeware) Download: Patch My PC Portable | 31.0 MB (Portable) View: Patch My PC Free Homepage | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • "For starters, Microsoft Edge is getting a media control center. This feature is intended to let you control multiple media sources from any website in a single place." Oh, I've got this Media Control and couldn't find how to disable it. I hate it when a button appears on a toolbar where there was none just before I press Play. I probably would find it at least somewhat useful if I could start playing media from any opened tab, but now it only shows controls for media I've already started playing. If anyone knows how to disable it - I'd appreciate a hint.
    • Now that he turned on Trump and both sides hate him does anyone want this stupid thing?
    • This is what I thought of earlier today because it seems a bit stupid to have an iPhone 17 running iOS 26 (or iOS 2026 / or even iOS 25/2025). Just make it simple so that the year of the hardware release and the software release are in sync. I personally think they should go with 25 or 2025 (not 26 or 2026), but syncing the hardware and software version numbers could be easier to keep track of. At first, it will maybe be jarring due to all of the changes across the ecosystem, but from that point on it will be easier to keep track of.
    • my dad is experiencing the same thing except it's with Excel. the font became thin compared to windows 10, all the settings the same. i've chalked it up to it being that its connected via DVI instead of HDMI. is your setup the same? i have no technical reasons to believe it's DVI, just a plain guess since the other screen he's connected to seems better to me although may just be my mind playing tricks.  also, why don't you change the text size in accessibility? maybe this will help?   
  • Recent Achievements

    • Week One Done
      abortretryfail earned a badge
      Week One Done
    • First Post
      Mr bot earned a badge
      First Post
    • First Post
      Bkl211 earned a badge
      First Post
    • One Year In
      Mido gaber earned a badge
      One Year In
    • One Year In
      Vladimir Migunov earned a badge
      One Year In
  • Popular Contributors

    1. 1
      +primortal
      492
    2. 2
      +FloatingFatMan
      256
    3. 3
      snowy owl
      248
    4. 4
      ATLien_0
      224
    5. 5
      +Edouard
      189
  • Tell a friend

    Love Neowin? Tell a friend!