Question

我正在使用libcurl将图像上传到bing视觉搜索api（v7）并将json响应存储在string中。但是我没有得到字符串的完整响应。请检查以下详细信息

POST请求如下

CURLcode res;
struct curl_httppost *post = NULL;
struct curl_httppost *last = NULL;
struct curl_slist* m_pHeaders  {nullptr};
curl_global_init(CURL_GLOBAL_ALL);
string strResponse;
cURl = curl_easy_init();
if(cURl)
{
    curl_easy_setopt(cURl, CURLOPT_URL,"https://api.cognitive.microsoft.com/bing/v7.0/images/visualsearch?mkt=en-us&safeSearch=Moderate");
    curl_easy_setopt(cURl, CURLOPT_POST, 1);
    curl_easy_setopt(cURl, CURLOPT_VERBOSE, 1L);

    curl_slist_append(m_pHeaders,"Accept: application/json");
    m_pHeaders = curl_slist_append(m_pHeaders,"Content-Type: multipart/form-data");
    m_pHeaders = curl_slist_append(m_pHeaders,"Ocp-Apim-Subscription-Key:MYKEYHERE");
    curl_easy_setopt(cURl, CURLOPT_HTTPHEADER, m_pHeaders);

 /* upload to this place */ 

    curl_formadd(&post, &last, CURLFORM_COPYNAME, "image",
    CURLFORM_FILE, "/mypathtoUSBDrive/sunny.jpg",
    CURLFORM_CONTENTTYPE, "image/*", CURLFORM_END);

    curl_easy_setopt(cURl, CURLOPT_HTTPPOST, post);
    curl_easy_setopt(cURl, CURLOPT_NOSIGNAL, 1);
    curl_easy_setopt(cURl, CURLOPT_TIMEOUT, 60L);
    curl_easy_setopt(cURl, CURLOPT_WRITEFUNCTION, m_WriteBufferCallback);
    curl_easy_setopt(cURl, CURLOPT_WRITEDATA, this);

    /* tell it to "upload" to the URL */ 
    //curl_easy_setopt(m_curl, CURLOPT_UPLOAD, 1L);


    res = curl_easy_perform(cURl);
    /* Check for errors */ 
    if(res != CURLE_OK) 
    {
      printf("curl_easy_perform() failed: %s\n",curl_easy_strerror(res));
    }
    else
    {
        printf("RESULT is : %s\n",strResponse.c_str());
    }

curl_slist_free_all(m_pHeaders);
curl_formfree(post);
curl_easy_cleanup(cURl);
}

Writecallback如下

size_t m_WriteBufferCallback(char *ptr, size_t size,size_t nmemb, void *stream)
{
    printf("SIZE Is (%d) and nMEMB is (%d)",size,nmemb);
    for (size_t c = 0; c < size * nmemb; c++)
    {
        strResponse.push_back(ptr[c]);
    }
    return size * nmemb;
}

响应如下

RESULT is : {"_type": "ImageKnowledge", "instrumentation": {"_type": "ResponseInstrumentation"}, "tags": [{"displayName": "", "actions": [{"_type": "ImageModuleAction", "actionType": "PagesIncluding", "data": {"value": [{"webSearchUrl": "https:\/\/www.bing.com\/images\/search?view=detailv2&FORM=OIIRPO&id=6F32937A127F30DE909228C3E3B2C63349DEF1A4&simid=608017422531691677", "name": "Actress - Bollywood Wallpapers Download FREE (Page - 821 ...", "thumbnailUrl": "https:\/\/tse4.mm.bing.net\/th?id=OIP._5HDL12anYZseYCZ3L9EMwHaEK&pid=Api", "datePublished": "2019-10-06T22:04:00.0000000Z", "isFamilyFriendly": true, "contentUrl": "https:\/\/mrpopat.in\/admin\/upload\/wallpaper\/2015010314202751881532910028.jpg", "hostPageUrl": "https:\/\/mrpopat.in\/popat_mobile\/wallpaper_collection.php?page=820&&&pid=143&cid=149", "contentSize": "139790 B", "encodingFormat": "jpeg", "hostPageDisplayUrl": "https:\/\/mrpopat.in\/popat_mobi

Writecallback打印如下 **

SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (8192)
SIZE Is (1) and nMEMB is (912)

**

请帮助您了解为什么无法在字符串中获得完整的响应，可能是怎么回事？

在C ++中从libCurl调用api时，bing视觉搜索api（v7）没有完全响应

0 个答案: