I'm working on an upload control for ASP.NET, and I need to work with Request.GetBufferlessInputStream()
This returns the raw unprocessed request stream. Is there a built in way to parse the content of this stream, stripping out headers such as the example I've copied below.
If not what is the best approach to parsing the file?
-----------------------------13166267887793
Content-Disposition: form-data; name="uploadFile"; filename="ABigFile.txt"
Content-Type: text/plain
The solution came from inspecting how it's done in System.Web, and adapting to my needs. The core functionality is found in an internal class called HttpMultipartContentTemplateParser. The system for processing the input stream is written up here:
http://blog.appsoftware.com/2014/03/aspnet-file-uploader-with-signalr.html
Related
I struggle to upload files using a POST HTTP request in JMeter, which file name (not file content) contains special characters such as "é è à". For example: "nameWithSpecialCharacters_éè.txt".
Is this a limitation of JMeter? I'm on 5.5 version (latest as of now).
Thank you for your help.
I tried several things such as putting file.encoding=UTF-8 in JMeter settings. I also put UTF-8 in "Content encoding" in HTTP Request sampler but none of these work... I have the same issue if I use BeanShell PreProcessor and set the files to upload with sampler.setHTTPFiles(filesToUpload)
No matter what I do the characters are replaced by "?" in the body of the request:
Content-Disposition: form-data; name="file1"; filename="nameWithSpecialCharacters_??.txt" Content-Type: text/plain Content-Transfer-Encoding: binary
It looks like a bug in the HttpClient4 implementation, I would suggest raising it via JMeter Issues
In the meantime as a workaround you could switch your HTTP Request sampler to use Java as the implementation:
If you have more than one HTTP Request sampler you could use HTTP Request Defaults to perform the change in one place for all.
I am trying to call /vision/v3.1/read/analyze API with a PDF, but sending Content-Type header as application/pdf or application/octet-stream is giving an InvalidImage error. What should be the header value ? Any code sample that I can refer to ?
The supported Content-Types are application/json- analyze images from URL and application/octet-stream - analyze images from disk. I tried the Read API reference and provided url for a pdf file. Confirmed using Get Read Result and works fine. Check out available code samples in python, tutorial and c#, tutorial.
below is example of postback message. I am posting data to a party using spring rest. In return they will send me raw pdf data along with postback message. How do I read this pdf data and download the pdf file in browser on request at later time.
Appreciate your help with the code.
of I am reference text
------------d0f32ac86c8249c9aa562c1fcfbfeb66
Content-Disposition: form-data; name="filename"
Bk-40274-tx17-Mess.pdf
------------d0f32ac86c8249c9aa562c1fcfbfeb66
Content-Disposition: form-data; name="fileformat"
pdf
------------d0f32ac86c8249c9aa562c1fcfbfeb66
Content-Disposition: form-data; name="file"; filename="Bk-40274-tx17-Mess.pdf"
Content-Type: application/pdf
You need to create UploadRestController that will receive pdf content.You can follow below link to develop your UploadRestController.
Spring : File Upload RESTFUL Web Service
Your UploadRestController will save file somewhere in file system and its file path/other stuff matadata in DB or Cache.
Develop another DownloadRestController that will give you PDF whenever requested.It will read file from file system using metadata and will set response.You can follow below link to develop DownloadRestController.
Return generated pdf using spring MVC
Almost everything I can find suggests using multipart/form-data, but the RFC seems to imply that it is for sending the contents of an HTML "form", and seems specifically suited for sending data that has multiple parts (multipart).
Reading a bit about the Content-Type header it seems that values like Content-Type: image/png (just using the MIME type) are valid, and this generally sounds more appropriate to me.
I cannot really find anything that promotes the usage of Content-Type: <MIME-type> for POSTing files however.
What is the correct approach for this?
multipart types are usually used when doing file uploads from a browser using form POST.
HTTP allows to use any media type with POST; but of course it depends what your server code supports.
Note that RFC 2388 is obsolete, you should look at RFC 7578 instead.
I need to upload a very large file to my server, through my Flex application, and I see that Flex Filereference upload() seems to be able to handle it. Does the upload() methods uploads a 'stream' to the servlet, or does it sends the whole ByteArray (As I understand it, the ByteArray will have the whole file contents, so a >1Gb file will flood my memory).
I haven't found confirmation of one or the other. It seems flex.net.FileReference source code is part of flash, not the open source flex, so I cant take a peek.
Anyone can confirm or deny the usage of the whole byteArray when sending file contents to the server?
Thanks
When trying to upload big files using Flash, the loading of the file into memory is not your biggest concern - the upload itself is quite unreliable. According to the Flex reference Flash player officially supports upload file sizes of up to 100 MB. My experience confirms that big file uploads often fail. You may check this file upload component for uploading large files in chinks and resuming partial uploads. However this solution also needs to fully load the file into memory before starting the upload.
The following sample HTTP POST request is sent from Flash Player to a server-side script if no parameters are specified:
POST /handler.cfm HTTP/1.1
Accept: text/*
Content-Type: multipart/form-data;
boundary=----------Ij5ae0ae0KM7GI3KM7
User-Agent: Shockwave Flash
Host: www.example.com
Content-Length: 421
Connection: Keep-Alive
Cache-Control: no-cache
------------Ij5GI3GI3ei4GI3ei4KM7GI3KM7KM7
Content-Disposition: form-data; name="Filename"
MyFile.jpg
------------Ij5GI3GI3ei4GI3ei4KM7GI3KM7KM7
Content-Disposition: form-data; name="Filedata"; filename="MyFile.jpg"
Content-Type: application/octet-stream
FileDataHere
------------Ij5GI3GI3ei4GI3ei4KM7GI3KM7KM7
Content-Disposition: form-data; name="Upload"
Submit Query
------------Ij5GI3GI3ei4GI3ei4KM7GI3KM7KM7--
It looks similar to the post request generated by a file input html control. So it's not a ByteArray, but still the browser would need to load the file to its memory before sending it; 1GB is too much for any file upload - flash or not.