libcurl post图片 base64编码

#include "httppost.h"

#include <curl/curl.h>

#include <string.h>

#include <sys/time.h>  

#define POSTURL "http://121.40.93.5:7300/dbzf/router/rest?method=api/picture/upload"  

#ifndef MAX_PATH

#define MAX_PATH 256

#endif

const char * base64char = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

char * base64_encode( const unsigned char * bindata, char * base64, int binlength )

{

    int i, j;

    unsigned char current;

    for ( i = 0, j = 0 ; i < binlength ; i += 3 )

    {

        current = (bindata[i] >> 2) ;

        current &= (unsigned char)0x3F;

        base64[j++] = base64char[(int)current];

        current = ( (unsigned char)(bindata[i] << 4 ) ) & ( (unsigned char)0x30 ) ;

        if ( i + 1 >= binlength )

        {

            base64[j++] = base64char[(int)current];

            base64[j++] = '=';

            base64[j++] = '=';

            break;

        }

        current |= ( (unsigned char)(bindata[i+1] >> 4) ) & ( (unsigned char) 0x0F );

        base64[j++] = base64char[(int)current];

        current = ( (unsigned char)(bindata[i+1] << 2) ) & ( (unsigned char)0x3C ) ;

        if ( i + 2 >= binlength )

        {

            base64[j++] = base64char[(int)current];

            base64[j++] = '=';

            break;

        }

        current |= ( (unsigned char)(bindata[i+2] >> 6) ) & ( (unsigned char) 0x03 );

        base64[j++] = base64char[(int)current];

        current = ( (unsigned char)bindata[i+2] ) & ( (unsigned char)0x3F ) ;

        base64[j++] = base64char[(int)current];

    }

    base64[j] = '\0';

    return base64;

}

int base64_decode( const char * base64, unsigned char * bindata )

{

    int i, j;

    unsigned char k;

    unsigned char temp[4];

    for ( i = 0, j = 0; base64[i] != '\0' ; i += 4 )

    {

        memset( temp, 0xFF, sizeof(temp) );

        for ( k = 0 ; k < 64 ; k ++ )

        {

            if ( base64char[k] == base64[i] )

                temp[0]= k;

        }

        for ( k = 0 ; k < 64 ; k ++ )

        {

            if ( base64char[k] == base64[i+1] )

                temp[1]= k;

        }

        for ( k = 0 ; k < 64 ; k ++ )

        {

            if ( base64char[k] == base64[i+2] )

                temp[2]= k;

        }

        for ( k = 0 ; k < 64 ; k ++ )

        {

            if ( base64char[k] == base64[i+3] )

                temp[3]= k;

        }

        bindata[j++] = ((unsigned char)(((unsigned char)(temp[0] << 2))&0xFC)) |

                ((unsigned char)((unsigned char)(temp[1]>>4)&0x03));

        if ( base64[i+2] == '=' )

            break;

        bindata[j++] = ((unsigned char)(((unsigned char)(temp[1] << 4))&0xF0)) |

                ((unsigned char)((unsigned char)(temp[2]>>2)&0x0F));

        if ( base64[i+3] == '=' )

            break;

        bindata[j++] = ((unsigned char)(((unsigned char)(temp[2] << 6))&0xF0)) |

                ((unsigned char)(temp[3]&0x3F));

    }

    return j;

}

void encode(FILE * fp_in, FILE * fp_out)

{

    unsigned char bindata[2050];

    char base64[4096];

    size_t bytes;

    while ( !feof( fp_in ) )

    {

        bytes = fread( bindata, 1, 2049, fp_in );

        base64_encode( bindata, base64, bytes );

        fprintf( fp_out, "%s", base64 );

    }

}

void decode(FILE * fp_in, FILE * fp_out)

{

    int i;

    unsigned char bindata[2050];

    char base64[4096];

    size_t bytes;

    while ( !feof( fp_in ) )

    {

        for ( i = 0 ; i < 2048 ; i ++ )

        {

            base64[i] = fgetc(fp_in);

            if ( base64[i] == EOF )

                break;

            else if ( base64[i] == '\n' || base64[i] == '\r' )

                i --;

        }

        bytes = base64_decode( base64, bindata );

        fwrite( bindata, bytes, 1, fp_out );

    }

}

int HttpPostJpegString(char *buf,int buf_len)

{

FILE *pictureSrc;

printf("buf=%s buf_len=%d\n",buf,buf_len);

pictureSrc=fopen("/tmp/webproject/pictureSrc.jpg","w+");

if (!pictureSrc) {

return -1;

}

printf("buf=%s\n",buf);

fwrite(buf, 1, buf_len,pictureSrc);

fseek(pictureSrc,0L,SEEK_SET);

HttpPostJpegFile(pictureSrc);

}

int HttpPostJpegFile(FILE *fp)

{

CURL *curl;  

CURLM *multi_handle;  

int still_running;

long int flength,first;

struct curl_httppost *formpost=NULL;  

struct curl_httppost *lastptr=NULL;  

struct curl_slist *headerlist=NULL;  

static const char buf[] = "Expect:"; 

char *didi;

FILE *pEncode;

pEncode=fopen("/tmp/webproject/pEncode.jpg","w+");

if (!pEncode) {

return -1;

}

encode(fp, pEncode);

fclose(fp);

printf("httpPostJpeg\n");

fseek(pEncode,0L,SEEK_SET);

printf("The file pointer is at byte %ld\n", ftell(pEncode));

first=ftell(pEncode);

printf("ftell success \n");

fseek(pEncode,0L,SEEK_END);

printf("The file pointer is at byte %ld\n", ftell(pEncode));

flength=ftell(pEncode)-first;

fseek(pEncode,0L,SEEK_SET);

printf("The file flength is at byte %ld\n", flength);

    /*read the data and display it*/  

didi=(char *) malloc(flength);

if(didi==NULL)

exit(1);

fread(didi,1,flength,pEncode);

fclose(pEncode);

curl_formadd(&formpost,  

 &lastptr,

 CURLFORM_COPYNAME, "imgBase64",  

 CURLFORM_COPYCONTENTS, didi, CURLFORM_END);  

curl = curl_easy_init();  

multi_handle = curl_multi_init();  

/* initalize custom header list (stating that Expect: 100-continue is not 

   wanted */  

headerlist = curl_slist_append(headerlist, buf);  

if(curl && multi_handle) {

  /* what URL that receives this POST */  

  curl_easy_setopt(curl, CURLOPT_URL,POSTURL);  

  curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);  

  curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);  

  curl_multi_add_handle(multi_handle, curl);  

  curl_multi_perform(multi_handle, &still_running);  

  do {

struct timeval timeout;  

int rc; /* select() return code */

fd_set fdread;

fd_set fdwrite;  

fd_set fdexcep;  

int maxfd = -1;  

long curl_timeo = -1;  

FD_ZERO(&fdread);  

FD_ZERO(&fdwrite);

FD_ZERO(&fdexcep);

/* set a suitable timeout to play around with */  

timeout.tv_sec = 1;  

timeout.tv_usec = 0;  

curl_multi_timeout(multi_handle, &curl_timeo);

if(curl_timeo >= 0) {  

  timeout.tv_sec = curl_timeo / 1000;  

  if(timeout.tv_sec > 1)  

timeout.tv_sec = 1;  

  else

timeout.tv_usec = (curl_timeo % 1000) * 1000;  

}  

/* get file descriptors from the transfers */  

curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);  

/* In a real-world program you OF COURSE check the return code of the 

   function calls.On success, the value of maxfd is guaranteed to be 

   greater or equal than -1.  We call select(maxfd + 1, ...), specially in 

   case of (maxfd == -1), we call select(0, ...), which is basically equal 

   to sleep. */  

rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);  

switch(rc) {  

case -1:  

  /* select error */  

  break;  

case 0:  

default:  

  /* timeout or readable/writable sockets */  

  printf("perform!\n");  

  curl_multi_perform(multi_handle, &still_running);  

  printf("running: %d!\n", still_running);

  break;  

}  

  } while(still_running);  

  curl_multi_cleanup(multi_handle);  

  /* always cleanup */

  curl_easy_cleanup(curl);

  /* then cleanup the formpost chain */  

  curl_formfree(formpost);

  /* free slist */

  curl_slist_free_all (headerlist);  

}

free(didi);

return 0;  

}