File content as of revision 0:fcd577a3925b:

/*
Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#include "HTTPPoster.h"
//#define __DEBUG
//#include "mydbg.h"
#include "dbg/dbg.h"

///HTTP Client data container for form(multipart/form-data)
HTTPPoster::HTTPPoster()
{
    DBG("\n");
    m_cur = 0;
    m_seq = 0;
    m_send_len = 0;
    m_fp = NULL;
    m_post_data.clear();
    m_buf.clear();
    m_boundary = "----mbedHTTPClientPoster";
    m_ContentType = "multipart/form-data; boundary="; 
    m_ContentType += m_boundary;
}

HTTPPoster::~HTTPPoster()
{
    DBG("m_post_data.size()=%d\n", m_post_data.size());
    if (m_fp) {
        fclose(m_fp);
        m_fp = NULL;
    }
}

bool HTTPPoster::addFile(const char* name, const char* path)
{
    DBG("%p name=%s path=%s\n", this, name, path);
    struct stpost data;

    m_fp = fopen(path, "rb");
    if (m_fp == NULL) {
        return false;
    }
    fseek(m_fp, 0, SEEK_END);
    data.length = ftell(m_fp);
    fclose(m_fp);

    string head = "Content-Disposition: form-data; name=\"";
    head += name;
    head += "\"; filename=\"";
    head += path; 
    head += "\"";

    data.head = head;
    data.value = path;
    data.file = true;
    m_post_data.push_back(data);
    return true;
}

bool HTTPPoster::add(const char* name, const char* value)
{
    DBG("%p name=%s value=%s\n", this, name, value);
    struct stpost data;

    string head = "Content-Disposition: form-data; name=\"";
    head += name;
    head += "\"";

    data.head = head;
    data.value = value;
    data.length = strlen(value);    
    data.file = false;
    m_post_data.push_back(data);
    return true;
}

int HTTPPoster::read(char* buf, int len)
{
    //DBG("buf=%p len=%d\n", buf, len);
    int c;
    switch(m_seq) {
        case 0:
            if (m_cur >= m_post_data.size()) {
                m_buf += "--";
                m_buf += m_boundary;
                m_buf += "--\r\n";
                m_seq = 4; // done
            } else {
                m_buf += "--";
                m_buf += m_boundary;
                m_buf += "\r\n";
                m_seq++;
            }
            break;
        case 1:
            m_buf += m_post_data[m_cur].head;
            m_buf += "\r\n\r\n";
            if (m_post_data[m_cur].file) {
                m_fp = fopen(m_post_data[m_cur].value.c_str(), "rb");
            }
            m_pos = 0;
            m_seq++;
            break;
        case 2:
            for(int i = 0; i < len; i++) {
                if (m_buf.size() >= len) {
                    break;
                }
                if (m_pos >= m_post_data[m_cur].length) {
                    m_seq++;
                    break;
                }
                if (m_post_data[m_cur].file) {
                    c = fgetc(m_fp);
                } else {
                    c = m_post_data[m_cur].value[m_pos];
                }
                m_buf += (char)c;
                m_pos++;
            }
            break;            
        case 3:
            m_buf += "\r\n";
            if (m_fp) {
                fclose(m_fp);
                m_fp = NULL;
            }
            m_cur++;
            m_seq = 0;
            break;
        default: // done
            break;
    }
    int len2 = m_buf.size();
    if (len2 > len) {
        len2 = len;
    }
    memcpy(buf, m_buf.data(), len2);
    m_buf.erase(0, len2);
    m_send_len += len2;
    DBG("m_len=%d m_send_len=%d len=%d len2=%d\n", m_len, m_send_len, len, len2);
    //DBG_HEX((uint8_t*)buf, len2);
    return len2;
}

string HTTPPoster::getDataType() //Internet media type for Content-Type header
{
    DBG("%s\n", m_ContentType.c_str());
    return m_ContentType;
}

int HTTPPoster::getDataLen() //For Content-Length header
{
    m_len = 0;
    for(int i = 0; i < m_post_data.size(); i++) {
        m_len += 2 + strlen(m_boundary) + 2;      // "--" boundary CRLF
        m_len += m_post_data[i].head.size() + 2; // Content-Disposition: ... CRLF
        m_len += 2;                               // CRLF  
        m_len += m_post_data[i].length;           // value / file body
        m_len += 2;                               // CRLF
        DBG("%d m_len=%d\n", i, m_len);
    }
    m_len += 2 + strlen(m_boundary) + 2 + 2;   // "--" boundary "--" CRLF
    return m_len;
}