andsonye / multipartencoder

C++ implementation of encoding HTTP multipart/form-data into a string buffer for POST action in HTTP clients

MultipartEncoder: A C++ implementation of encoding multipart/form-data

You may find the asynchronous http-client, i.e. cpprestsdk, does not support posting a multipart/form-data request. This MultipartEncoder is a work around to generate the body content of multipart/form-data format. So that then you can use a cpp HTTP-client, which is not limited to cpprestsdk, to post a multipart/form-data request by setting the encoded body content.

Build & Run

1. Clone the MultipartEncoder repository

   # Make sure to clone with --recursive
   git clone --recursive https://github.com/AndsonYe/MultipartEncoder.git

2. If not cloned with --recursive, you need to manually get the cpprestsdk submodle

   Ignore this step if you followed step 1 above.

   git submodule update --init --recursive

3. Install dependencies required by cpprestsdk

   sudo apt-get install g++ git make zlib1g-dev libboost-all-dev libssl-dev cmake

4. Build cpprestsdk. Suppose the directory you cloned MultipartEncoder into is MultipartEncoder_ROOT

   cd $MultipartEncoder_ROOT/cpprestsdk/Release
   mkdir build
   cd build
   cmake ..
   make -j$(nproc)

5. Build MultipartEncoder sample

   cd $MultipartEncoder_ROOT
   make

6. Run the sample

   ./run.sh

   The response is writtern in file $MultipartEncoder/results

Usage

MultipartParser parser;                             //Create parser instance;
parser.AddParameter(key, value);                    //Add text parameters using AddParameter
parser.AddFile(key, file_path);                     //Add file content using AddFile
std::string boundary = parser.boundary();           //Get the boundary generated by parser, each parser has its unique boundary, this boundary should be set in the HTTP request's header
std::string body = parser.GenBodyContent();         //Get the encoded multipart/form-data body content

Then you can use boundary and body in any HTTP clients.

Check the parser_test.cpp for complete example.

multipartencoder's Issues

error: conversion to ‘int’ from ‘size_t {aka long unsigned int}’ may alter its value [-Werror=conversion]

first make error appead, after edit the file threadpool.h from size_t num_threads to int num_thread,

there are still some ways to change, in the file threadpool.cpp,
three place to change type size_t to int, then make -j4
but the error appead this:

error: no matching function for call to ‘make_shared(std::reference_wrapper<boost::asio::io_context>)’

is there any way to solve the make error?

How to download file (Any file)

I have a link to download some binary file .

std::strings are not deleted

MultipartEncoder/multipart_parser.cpp

Line 61 in 3377874

std::string *filename = new std::string();

The pointers to std::string are being deleted, leading to a very fast memory leak (for a large number of files). The heap calls aren't even necessary since you could just put the strings on the stack.

Clarify licensing

At a glance I could not figure out under which license this code is.

It would be helpful if you added a LICENSE or at least mention the license in the readme or in the header.

nested

Hi
What if we need it in nested like in woocommerce image for product:
https://woocommerce.github.io/woocommerce-rest-api-docs/?php#create-a-product
that is :
[
'name' => 'Premium Quality',
'images' => [
[
'src' => 'http://demo.woothemes.com/woocommerce/wp-content/uploads/sites/56/2013/06/T_2_front.jpg'
]
]
];

form/multipart parser at Http Server side.

Can this parser works for HttpServer/ listener?