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Rest API Call setBinaryField() for sending attachment to Rollbase


Rest API Call setBinaryField() for sending attachment to Rollbase

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I am trying to send an attachment (.pptx) to Rollbase via REST API call. I am using the setBinaryField api call to perform this task and the string that I am using is given below:

updateRecordStr = ServerStr & "/rest/api/setBinaryField?sessionId=" & sessionID & "&id=" & recordIDStr & "&fieldName=file&value=" & attachStr & "&fileName=xyz.pptx" "&contentType=application/vnd.openxmlformats-officedocument.presentationml.presentation"

Is the above given string ok? Because when I am performing an HTTP send, my application stops working.

Set objHTTP = CreateObject("WinHttp.WinHttpRequest.5.1")
objHTTP.Open "POST", FullURLPath, False
objHTTP.setRequestHeader "User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"
objHTTP.Send ("")

I am also getting an error: Unknown API for POST request setBinaryField. Do you guys find any problem with the API?

Verified Answer
  • Hi Iramk,
    Take a look.. it is working…
    Remember to update for your sessionid, field name, id and etc…
All Replies
  • I have been able to get past the Unknown API for POST request setBinaryField by replacing that function with setDataField. But this time I am getting another error i.e.



    <title>414 Request-URI Too Large</title>


    <h1>Request-URI Too Large</h1>

    <p>The requested URL's length exceeds the capacity

    limit for this server.<br />



    <address>Apache/2.2.27 (Amazon) Server at Port 443</address>


    May I know why its giving this error?

  • Try moving URL parameters to objHTTP.Send ("") call.

  • FullURLPath:


  • Can you give me an example please? I have added my complete URL path.

  • setDataField seems to work on small files. When I encoded a 1kb PNG file to BASE64 and used it on value parameter, the REST request worked. Though when I used an 11kb PNG file, it did not work nor returned any error.

    Below is a sample code written in Ruby:

    require 'httparty'
    class RestGet
      include HTTParty
      base_uri 'http://localhost:8830/rest/api'
      def initialize ()
      def login(username, password, output)
        options = { query: {loginName: username, password: password, output: output} }
        self.class.get("/login", options)
      def getBinaryData(sessionId, objName, id, fieldName)
        options = { query: {sessionId: sessionId, objName: objName, id: id, fieldName: fieldName} }
        self.class.get("/getBinaryData", options)
      def setDataField(sessionId, objName, id, fieldName, value, contentType, fileName, output)
        options = { query: {sessionId: sessionId, objName: objName, id: id, fieldName: fieldName, value: value, contentType: contentType, fileName: fileName, output: output} }"/setDataField", options)  
    RestInstance =
    RestLogin = RestInstance.login("customer1", "yourpassword", "json") #Generate sessionId for REST transaction
    sessionId = RestLogin["sessionId"] 
    puts "sessionId:" + sessionId 
    RestgetBinaryData = RestInstance.getBinaryData(sessionId, "student", 14304, "file") #Get Binary Data of "file" from Record 14304
    #puts "\n<<==Binary data start==>>\n" + RestgetBinaryData + "\n<<==Binary data end==>>\n"
    b64BinaryData = Base64::encode64(RestgetBinaryData) # Encode binary data to Base64
    #puts "\n<<==Base 64 encoded data start==>>\n" + b64BinaryData + "\n<<==Base 64 encoded data end==>>\n"
    RestSetDataField = RestInstance.setDataField(sessionId, "student", 14305, "file", b64BinaryData, "image/png", "ua.png", "json") #Set File Upload field "file" of Record 14305
    puts RestSetDataField

    Can you also test uploading a small file using your script? 



  • Please make sure that your code handles multipart HTTP requests correctly.

  • Hello Godfrey,

    Yes I have tried uploading a small text file using my script and it works every time. But I haven't been able to do the same for a .pptx, .docx, .pdf file. I am trying to make sure that one rbfSet (binary/data field) does the job for all files regardless of type by specifying their respective MIME types. Any suggestions on that?

  • I have tried this now and it looks like its almost there.

    objHTTP.Open "POST", ServerStr & "/rest/api/setDataField?", False

                   objHTTP.setRequestHeader "Content-Type", "multipart/form-data; Charset=UTF-8; boundary=" + Boundary

                   objHTTP.setRequestHeader "Content-Length", Len(attachStr)

                   objHTTP.setRequestHeader "Content-Disposition", "form-data; name='file'"

                   objHTTP.setRequestHeader "User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"

                   objHTTP.Send ("sessionId=" & IdRet & "&id=" & recordIDStr & "&fieldName=file&value=" & attachStr & _

                   "&contentType=application/vnd.openxmlformats-officedocument.presentationml.presentation&fileName=" & attachNameStr)

    Getting this error now:

    <?xml version="1.0" encoding="UTF-8" ?>

    <resp status="fail">

    <err>Corrupt form data: premature ending</err>


    Any suggestions?

  • Hi Iram,

    I am  testing REST using SOAPUI 5.0.0.

    this is my raw file.. maybe it can help you.

    POST http://localhost:8080/rest/api/setDataField HTTP/1.1

    Accept-Encoding: gzip,deflate

    Content-Type: application/x-www-form-urlencoded

    Content-Length: <automatic calculated>

    Host: <automatic populated>

    Connection: Keep-Alive

    User-Agent: Apache-HttpClient/4.1.1 (java 1.5)

    sessionId=<csession id>&id=<record id>&fieldName=<object field name>&fileName=<file name + extention>&objName=<object name>&contentType=<content type>=<base64 file>

    my example:

    sessionId=cfa868a212c14066910790c7096bded3%401&id=306212&fieldName=file&fileName=test.pdf&objName=teste_templates&contentType=application%2Fpdf&value=<base 64 file here>

    I used a 67k pdf file and it worked.

    I converted my file using and removed all "enters" between the lines.

  • Hello Ricardo,

    Could you tell me as to how did you get the Content Length? I am using VBA and I calculated my content length from the string length of my base64 string. Is that correct? Also now it partially seems to work but now I am getting an error : No URL parameter "sessionId" (case-sensitive)

    Dim ContentLength As Long

    ContentLength = Len(attachStr)

    objHTTP.Open "POST", ServerStr & "/rest/api/setDataField?", False

    objHTTP.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"

    objHTTP.setRequestHeader "Content-Length", ContentLength

    objHTTP.setRequestHeader "Content-Disposition", "form-data;name='file';filename='RB_User_Guide.pdf"

    objHTTP.setRequestHeader "User-Agent", "Apache-HttpClient/4.1.1"

    objHTTP.Send ("sessionId=" & IdRet & "&objName=temphistoryattachment&id=" & recordIDStr & "&fieldName=file&value=" & attachStr & "&contentType=application/pdf&fileName=" & attachNameStr & "&output=xml")


    <?xml version="1.0" encoding="UTF-8" ?>

    <resp status="fail">

    <err>No URL parameter "sessionId" (case-sensitive)</err>


  • The content length is the total characters of your objHTTP.Send.

    my example:


    the length is 155.

    when I change for a base 64, the length is 106006

    another example:


    the length is 166.

    The error No URL parameter "sessionId" (case-sensitive) means your session ID is expired or not filled.

  • I'm not sure why but I have used the same sessionId everywhere else and it just works everytime but when I come to this code, it expires? I have checked whether there is a sessionId or not and it always is available. Also I tried getting a new session Id but that displayed the same error. "No URL parameter "sessionId"".

    Also, I noticed something peculiar. Files with a small size gets uploaded properly (with correct size but cannot open those files via Rollbase) but the ones with a larger size (about 2MB) get back with that error. 

  • I was able to replicate the error.

    It happens when I tried to call the API without sending any parameter.


    <resp status="fail">

    <err>No URL parameter "sessionId" (case-sensitive)</err>


  • I am guessing the URL length is going out of hand for it to cope up with the file size which is possibly why the send is not performing properly. Is your base64 string immensely huge as well?

  • Please remove "?" from URL