I have a programming project where I have to create a multithreaded web server which handles HTTP requests.
I just learned socket programming and I got a client and a server running. I wanted to know what the best method would be for parsing the HTTP request headers. I saw this: how to parse http request in c++ a few minutes back. But I would rather not shift to C++ at this point. So how should one go about parsing an HTTP request in C?
You can have a look at the web servers in C such as mongoose (https://github.com/cesanta/mongoose/blob/master/mongoose.c) and could use the same methodology to parse the http request. But what would I suggest is that just go through the HTTP RFC 2616 since that would help you in writing your own parser for http requests.
By the way which kind of HTTP requests your Server is handling (GET or POST or BOTH) ??
In http post requests the HTTP header & data are separated by "\r\n\r\n".
In received data sscanf the Content-Length form the http header then start reading the data after you get "\r\n\r\n" until you get the same amount of data as mentioned in Content-Length.
Related
In scala, We are calling akka http API from the client code written in C. But when we call the API it only prints akka.actor.default-dispatcher new connection accepted but actual data transfer over http call (request response) not happens. Only connection happens with the client.
When we do same with postman the actual request came in actor and get processed. What should be the solution to get the http API works.
I'm trying to handle error responses returned from the Google Cloud Pub/Sub api using their node client library. From what I can see, if you use their REST API directly (ie. not through the client library) they return common HTTP error codes:
https://cloud.google.com/pubsub/docs/reference/error-codes
However, their client library returns RPC style errors that do not adhere to http status code conventions.
I have a worker that is processing these responses and is expecting responses to conform to standard http response conventions. Does anyone know if there is a way to intercept the actual HTTP response that the client is handling and extract a status code from it? Alternatively, is there documentation somewhere listing out the potential RPC errors the node client can return so I can set up a mapping from them to http codes?
Thanks!
FYI this got answered as a Github issue here: https://github.com/GoogleCloudPlatform/google-cloud-node/issues/2761#issuecomment-348358474
I am sending outbound messages from Salesforce. They are always sending as POST, though. Is there a way to change the method they are using?
I'd like to send some of them as PUT, instead (and, eventually, some DELETE). I'm not finding anything from Google searches.
Outbound Messages are SOAP 1.1 based, and as such are required to use POST by the SOAP 1.1 spec, so there are no options to use other HTTP methods for the Outbound Message requests.
If you want to send HTTP requests instead of SOAP messages, you'll need to write an Apex trigger and use a future method to make the HTTP request from apex.
I want to get the all http requests which are going through proxy. And i need to show them in an output file
Actually my proxy server is storing all the requests in STDIN. So now i should get the data/header requests from that STDIN. Is that possible to get? if possible please let me know how to proceed
I am currently building an http web client using sockets which gets a url as input and should perform the following task: Connect to the web server and save the response of the server in a file, and print the status code included in the http response.
I have completed the first part of writing in a file and I am having a problem with retrieving the status code. Is there a library or a function that could help me?
You should use libcurl to perform the HTTP request.
And the function curl_easy_getinfo to get the HTTP code.
The first line of the response is the status line, and is very easy to parse. It consists of the protocol version followed by a numeric status code and its associated textual phrase ("OK", "Not Found" etc).
For example:
HTTP/1.1 200 OK
The exact syntax and the list of valid codes is documented in RFC 2616 (section 6.1).