content-length

I'm building an API on Rails version 4.1.7/Nginx that responds to request from an iOS app. We're seeing some weird caching on the client and we think it has something to do with a small difference in the response that Rails is sending back. My questions... 1) I want to understand why, for the exact same request (with only the Authorization header value changed), Rails sends back transfer-encoding: chunked sometimes and Content-Length: <number> sometimes? I thought that maybe it had something to do with the response size, but in the example responses whose headers I've pasted below, the data

I'm currently trying to optimize http-based data transfer between several applications. Our current approach, downloading first and then creating the post-request, obviously add extra IO/memory load and latencies, which I'd like to circumvent. The core question of all: Is it required to send a "Content-Length" header in HTTP POST requests? IIRC, HTTP 2616 declares that it's optional, but I'm not sure how applications actually behave at this point. Depends what you mean by optional. If you mean that you can just omit the header anytime you like then no, it is not optional. The HTTP spec has

So, I'm uploading a file, and then downloading it... but the Content-Length in the upload headers do not match the file size. I'm guessing there is some other data involved with this calculation and transfer, but what exactly? How do I get an accurate file size from the Content-Length? Is it even possible? I know there are the boundaries, and maybe some other things, but check it: 5380216 - 5379906 = 310 "----WebKitFormBoundaryeoFyqD4zr6smwYDG".size → 38 So the boundary size is 38... 310 has some LCDs of 5, 10, 31... those don't work well with 38 in any way... I'm lost! File sizes: -rw-r--r--@

I want to get content size by request.getContentLength() in server client JSP page. But request.getContentLength() always return -1, i do not why? Android snippet code: URL uri = new URL(actionUrl); HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); //conn.setChunkedStreamingMode(100); conn.setConnectTimeout(setTimeOut>0?setTimeOut:timeoutConnection); conn.setReadTimeout(setTimeOut>0?setTimeOut:timeoutConnection); conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(false); conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "keep-alive"); //conn

I use node.js and express at a small project. I set response header like blow: res.set({'Content-Type':'text/plain;charset=utf-8', 'Content-Length': Buffer.byteLength(data, 'utf-8')}); I can use console.log print data's length is 317. But at browser's console, I just get these: Connection:keep-alive Content-Encoding:gzip Content-Type:text/plain;charset=utf-8 Date:Sat, 01 Jun 2013 08:21:59 GMT Transfer-Encoding:chunked Vary:Accept-Encoding X-Powered-By:Express So, why the content-length disappeared? Myrne Stol The response has Transfer-Encoding: chunked . Here Content-Length is not applicable,