1.翔云人脸识别的API

1.1 图片img上传是以base64流的形式上传

百度百科
图片是由无数个"小色块’组成每个小色块都是由红绿蓝来表示
#ff9899…
这样图片就能用字符串表示
Linux自带base64工具

直接base64 xxx.jpg 就能看到该图片的64流编码
程序里的代码

system("base64 reba1.jpg > tmpFile");

把生成的编码传到tmpFile

2.代码

#include <stdio.h>
#include <curl/curl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

typedef unsigned int bool;
#define true 1
#define false 0
char buf[1024] = {'\0'};

size_t readData( void *ptr, size_t size,size_t nmemb, void *stream)
{

    strncpy(buf,ptr,1024);
//    printf("==================get data================\n");
    printf("%s\n",buf );
}
char* getPicBase64FromFile(char *filePath)
{
	char *bufPic;
	char cmd[128] = {'\0'};
	sprintf(cmd,"base64 %s > tmpFile",filePath);
	system(cmd);
	int fd = open("./tmpFile",O_RDWR);
	int fileLen = lseek(fd,0,SEEK_END)+2;
	lseek(fd,0,SEEK_SET);
	bufPic = (char *)malloc(fileLen);
	memset(bufPic,'\0',fileLen);
	read(fd,bufPic,fileLen);
	close(fd);
	system("rm -f tmpFile");
	return bufPic;
}

bool postUrl()
{
    CURL *curl;
    CURLcode res;
    char *postString;

    char *key = "5Fr48MNMbvTMDbjhD4****";
    char *secret = "f6b80478f43148c9bf4de0c9b9ec****";
    int typeId = 21;
    char *format = "xml";

    char *bufPic1 = getPicBase64FromFile("reba1.jpg");
    char *bufPic2 = getPicBase64FromFile("reba2.jpg");


	int len = strlen(key)+strlen(secret)+strlen(bufPic1)+strlen(bufPic2)+124;
    postString = (char *)malloc(len);
	memset(postString,'\0',len);

    sprintf(postString,"&img1=%s&img2=%s&key=%s&secret=%s&typeId=%d&format=%s",bufPic1,bufPic2,key,secret,typeId,format);
    curl = curl_easy_init();
    if (curl)
    {
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postString);    // 指定post内容
        curl_easy_setopt(curl, CURLOPT_URL, "https://netocr.com/api/faceliu.do");   // 指定url
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, readData);
        res = curl_easy_perform(curl);
        if(strstr(buf,"是") != NULL){
        	printf("the same person\n");
        }else{
        	printf("different person\n");
        }
        printf("Return:%d\n",res);
        curl_easy_cleanup(curl);
    }
    return true;
}

int main(void)
{
    postUrl();
}

遇到过的报错
1.产品类型错误
原因：typeId没有严格按照网页的填写，我写成了typeID
出错代码

sprintf(postString,"&img1=%s&img2=%s&key=%s&secret=%s&typeID=%d&format=%s","bufPic1","bufPic2",key,secret,typeId,format);