RTOS/DK-TM4C129X: How can I upload large file (about 1M) to the TM4C129X embedded web server

AJ_ee

Expert 1930 points

Part Number: DK-TM4C129X

Tool/software: TI-RTOS

Hello,

I am working on a project that requires me to upload files from the PC (wav(1M size), doc, excel) to an embedded web server running on a TM4C129X chip. I'm using TI RTOS, NDK, BSD sockets. I have beginner html and javascript skills. Could you please point me to the right direction because I am clueless on what to do next. This is what I have done based what I have researched so far. Below is a simple HTML code that allows me to upload a simple text file. It looks like I could do it with a text file. Please see the output below the HTML. But when I try uploading a doc or a wav file, I don't see the contents being transferred. From what I have gathered, it might be a buffer, memory issue on the server side. I tried changing TCP parameters of the TI RTOS config file like the TCP receive buffer size, reassembly packets, buffer size limit.. and no matter what I did I still got the same result --> I played around with the size of the text file and this is what happens -> If the file size is <= 1166 bytes, I am able to get the contents of text file. If it goes higher than that, then transfer fails. I am still a beginner when it comes to web servers so there might be other ways to do this right.. Any suggestion is greatly appreciated.

Thanks

Below is the html code and the output from the serial port.

<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
    <meta charset="utf-8">
    <title>File Transfer</title>
    
    <style>
      body {
        width: 305px;
        margin: 0 auto;
        background-color: #ccc;
      }
    </style>
    
</head>
<body>
    <h1>File Transfer</h1>
    <p><img src="pic.jpg" alt="First-In"></p>
    <form method='POST' enctype='multipart/form-data' action='fup.cgi'>
      <p>Upload file</p>
      <input type="file" name="File" value="File">
      <p></p>
      <input type="submit" name="Upload" value="Upload">
    </form>
</body>
</html>

This is the output when my text file is <= 1166 bytes

Message = POST /fup.cgi HTTP/1.1
Referer: 10.20.30.120/File_Transfer.html
Cache-Control: max-age=0
Content-Type: multipart/form-data; boundary=---------------------------7e259540702
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134
Accept-Language: en-US
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Upgrade-Insecure-Requests: 1
Accept-Encoding: gzip, deflate
Host: 10.20.30.120
Content-Length: 286
Connection: Keep-Alive

-----------------------------7e259540702
Content-Disposition: form-data; name="File"; filename="Test.txt"
Content-Type: text/plain

Hello
-----------------------------7e259540702
Content-Disposition: form-data; name="Upload"

Upload
-----------------------------7e259540702--

Number of bytes received = 866

And this is the output if the file is huge

over 7 years ago

0 Steven Connell over 7 years ago

TI__Mastermind 45025 points

Hi AJ_ee,

Have you taken a Wireshark capture of these 2 scenarios?

If not, could you please do so and attach each of these capture files to this thread? (please attach the actual capture files saved from the Wireshark program, i.e. please do not simply post screen shots of your Wireshark captures).

Steve

0 ToddMullanix over 6 years ago in reply to Steven Connell

TI__Guru* 96960 points

Hi,

Did this get resolved?

Todd

0 AJ_ee over 6 years ago in reply to ToddMullanix

Expert 1930 points

Hi Todd, Steve,

Yes I finally figured this out. I was able to transfer large files using Ajax. The link below is an article about file transfer. I tweaked the author's sample code to make it work for my application. The file is treated as a blob and using file.slice, I broke it into chunks and sent it using XMLhttp

www.accelebrate.com/.../

Thanks.

Regards,

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RTOS/DK-TM4C129X: How can I upload large file (about 1M) to the TM4C129X embedded web server