c++通过抖音分享链接获取视频长链接的多种实现代码

以下是两种实现方式：

方式一：使用正则表达式

#include <iostream>
#include <string>
#include <regex>

using namespace std;

string getVideoUrl(string shareUrl) {
    regex reg("https://v.douyin.com/(\\w+)/");
    smatch match;
    if (regex_search(shareUrl, match, reg)) {
        string itemId = match[1];
        string apiUrl = "https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=" + itemId;
        // 发送网络请求获取视频信息
        // ...
        return videoUrl;
    }
    return "";
}

int main() {
    string shareUrl = "https://v.douyin.com/JdQeX7B/";
    string videoUrl = getVideoUrl(shareUrl);
    if (videoUrl.empty()) {
        cout << "获取视频链接失败" << endl;
    } else {
        cout << "视频长链接：" << videoUrl << endl;
    }
    return 0;
}

方式二：使用第三方库

#include <iostream>
#include <string>
#include <curl/curl.h>
#include <rapidjson/document.h>

using namespace std;

size_t writeCallback(char* ptr, size_t size, size_t nmemb, void* userdata) {
    string* response = reinterpret_cast<string*>(userdata);
    response->append(ptr, size * nmemb);
    return size * nmemb;
}

string getVideoUrl(string shareUrl) {
    CURL* curl = curl_easy_init();
    if (curl) {
        // 设置请求URL
        string apiUrl = "https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?url=" + shareUrl;
        curl_easy_setopt(curl, CURLOPT_URL, apiUrl.c_str());
        // 设置请求头
        struct curl_slist* headers = NULL;
        headers = curl_slist_append(headers, "User-Agent: okhttp/3.12.1");
        headers = curl_slist_append(headers, "Connection: keep-alive");
        headers = curl_slist_append(headers, "Host: www.iesdouyin.com");
        headers = curl_slist_append(headers, "Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7");
        headers = curl_slist_append(headers, "Accept-Encoding: gzip, deflate, br");
        headers = curl_slist_append(headers, "Content-Type: application/json");
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        // 设置响应处理函数
        string responseBody;
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &responseBody);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCallback);
        // 发送网络请求
        CURLcode res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            cout << "网络请求失败：" << curl_easy_strerror(res) << endl;
            return "";
        }
        // 解析响应JSON
        rapidjson::Document doc;
        doc.Parse(responseBody.c_str());
        if (!doc.IsObject() || doc.HasParseError()) {
            cout << "解析响应失败" << endl;
            return "";
        }
        if (doc.HasMember("item_list") && doc["item_list"].IsArray()) {
            const rapidjson::Value& itemList = doc["item_list"];
            if (itemList.Size() > 0 && itemList[0].IsObject()) {
                const rapidjson::Value& video = itemList[0]["video"];
                if (video.IsObject() && video.HasMember("play_addr") && video["play_addr"].IsObject()) {
                    const rapidjson::Value& playAddr = video["play_addr"];
                    if (playAddr.HasMember("url_list") && playAddr["url_list"].IsArray()) {
                        const rapidjson::Value& urlList = playAddr["url_list"];
                        if (urlList.Size() > 0 && urlList[0].IsString()) {
                            string videoUrl = urlList[0].GetString();
                            return videoUrl;
                        }
                    }
                }
            }
        }
        return "";
    }
    return "";
}

int main() {
    string shareUrl = "https://v.douyin.com/JdQeX7B/";
    string videoUrl = getVideoUrl(shareUrl);
    if (videoUrl.empty()) {
        cout << "获取视频链接失败" << endl;
    } else {
        cout << "视频长链接：" << videoUrl << endl;
    }
    return 0;
}

以上代码仅供参考，具体实现方式还需要根据实际情况进行修改。