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README.md

multipart-post

Presentation

HTTP Multipart Post helper that does just that.

Dependencies

The module itself only depends on luasocket (for ltn12).

Tests require cwtest, a JSON parser and the availability of httpbin.org.

Usage

local mp = require "multipart-post"
local http = require "socket.http"

local rq = mp.gen_request({myfile = {name = "myfilename", data = "some data"}})
rq.url = "http://httpbin.org/post"
local b, c, h = http.request(rq)

See LuaSocket's http.request (generic interface) for more information.

If you only need to get the multipart/form-data body use encode:

local body, boundary = mp.encode({foo = "bar"})
-- use `boundary` to build the Content-Type header

Advanced Usage

Example using ltn12 streaming via file handles

local file = io.open("myfilename", "r")
local file_length = file:seek("end")
file:seek("set", 0)

local rq = mp.gen_request({
	myfile = {
        name = "myfilename",
        data = file,
        len = file_length,
    }
})

Example using ltn12 source streaming

local ltn12 = require "socket.ltn12"

local rq = mp.gen_request({
	myfile = {
        name = "myfilename",
        data = ltn12.source.string("some data"),
        len = string.len("some data"),
    }
})
rq.url = "http://httpbin.org/post"
local b, c, h = http.request(rq)

Bugs

Non-ASCII part names are not supported. According to RFC 2388:

Note that MIME headers are generally required to consist only of 7- bit data in the US-ASCII character set. Hence field names should be encoded according to the method in RFC 2047 if they contain characters outside of that set.

Note that non-ASCII file names are supported since version 1.2.

Contributors

Copyright

  • Copyright (c) 2012-2013 Moodstocks SAS
  • Copyright (c) 2014-2020 Pierre Chapuis

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HTTP Multipart Post helper that does just that.

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