跨越网络边界：借助C++编写的下载器程序，轻松获取Amazon商品信息

#include <iostream>
#include <curl/curl.h>
#include <regex>
#include <string>
#include <vector>

// 爬虫代理加强版***配置信息
const std::string PROXY_HOST = "www.HOST.cn";   //代理服务器地址 
const std::string PROXY_PORT = "PORT";         //端口号
const std::string PROXY_USER = "USER";         //用户名
const std::string PROXY_PASS = "PASS";           //密码

// 亚马逊商品页面的URL
const std::string AMAZON_PRODUCT_URL = "商品页面链接";

// 正则表达式用于匹配商品信息
const std::regex PRICE_REGEX(R"(<span id="priceblock_ourprice".*?>(.*?)</span>)");
const std::regex RATING_REGEX(R"(<span id="acrCustomerReviewText".*?>(.*?)</span>)");

// 回调函数用于处理数据
size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp) {
    ((std::string*)userp)->append((char*)contents, size * nmemb);
    return size * nmemb;
}

// 解析价格和评价数量的函数
void ParseProductInfo(const std::string &html, std::vector<std::string> &prices, std::vector<std::string> &ratings) {
    std::smatch matches;
    std::string::const_iterator searchStart(html.cbegin());
    while (std::regex_search(searchStart, html.cend(), matches, PRICE_REGEX)) {
        prices.push_back(matches[1]);
        searchStart = matches.suffix().first;
    }
    searchStart = html.cbegin();
    while (std::regex_search(searchStart, html.cend(), matches, RATING_REGEX)) {
        ratings.push_back(matches[1]);
        searchStart = matches.suffix().first;
    }
}

int main() {
    CURL *curl;
    CURLcode res;
    std::string readBuffer;
    std::vector<std::string> prices;
    std::vector<std::string> ratings;

    curl_global_init(CURL_GLOBAL_DEFAULT);
    curl = curl_easy_init();
    if(curl) {
        // 设置爬虫代理服务器
        curl_easy_setopt(curl, CURLOPT_PROXY, PROXY_HOST.c_str());
        curl_easy_setopt(curl, CURLOPT_PROXYPORT, std::stoi(PROXY_PORT));
        curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, PROXY_USER.c_str());
        curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, PROXY_PASS.c_str());

        // 设置URL和回调函数
        curl_easy_setopt(curl, CURLOPT_URL, AMAZON_PRODUCT_URL.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);

        // 执行HTTP请求
        res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        } else {
            // 解析页面内容
            ParseProductInfo(readBuffer, prices, ratings);

            // 输出解析结果
            std::cout << "价格列表: ";
            for (const auto &price : prices) {
                std::cout << price << " ";
            }
            std::cout << "\n评价数量列表: ";
            for (const auto &rating : ratings) {
                std::cout << rating << " ";
            }
            std::cout << std::endl;
        }

        // 清理
        curl_easy_cleanup(curl);
    }
    curl_global_cleanup();

    return 0;
}