使用 C++ 实现验证码识别与自动化登录

1. 安装所需依赖
   确保你已经安装以下库：

libcurl：用于发送 HTTP 请求。
OpenCV：用于图像处理。
Tesseract：用于 OCR 识别。
在 Ubuntu 系统中，你可以使用以下命令安装这些依赖：

bash

sudo apt-get install libcurl4-openssl-dev
sudo apt-get install libopencv-dev
sudo apt-get install tesseract-ocr libleptonica-dev
2. 下载验证码图片
使用 libcurl 下载验证码图片并保存到本地：

cpp

include

include <curl/curl.h>

include

size_t write_data(void ptr, size_t size, size_t nmemb, std::ofstream &stream) {
size_t written = stream.write(reinterpret_cast<const char>(ptr), size * nmemb).tellp();
return written;
}更多内容联系1436423940

void download_captcha(const std::string &url, const std::string &save_path) {
CURL *curl;
std::ofstream file(save_path, std::ios::binary);
CURLcode res;

curl = curl_easy_init();
if (curl) {
    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, NULL);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &file);
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    file.close();
    if (res != CURLE_OK) {
        std::cerr << "下载失败: " << curl_easy_strerror(res) << std::endl;
    } else {
        std::cout << "验证码图片已保存为 " << save_path << std::endl;
    }
}

}
3. 图像处理和 OCR 识别
使用 OpenCV 和 Tesseract 进行图像处理和 OCR 识别：

cpp

include <opencv2/opencv.hpp>

include <tesseract/baseapi.h>

include <tesseract/ocrclass.h>

std::string recognize_captcha(const std::string &image_path) {
cv::Mat image = cv::imread(image_path, cv::IMREAD_GRAYSCALE);
cv::threshold(image, image, 127, 255, cv::THRESH_BINARY);

tesseract::TessBaseAPI *ocr = new tesseract::TessBaseAPI();
ocr->Init(NULL, "eng");
ocr->SetImage(image.data, image.cols, image.rows, 1, image.step[0]);
char *outText = ocr->GetUTF8Text();

std::string result(outText);
delete[] outText;
ocr->End();
return result;

}
4. 自动化登录
使用 libcurl 发送 POST 请求，模拟登录操作，并传递用户名、密码和识别出的验证码：

cpp

void login(const std::string &username, const std::string &password, const std::string &captcha) {
CURL *curl;
CURLcode res;

curl = curl_easy_init();
if (curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://captcha7.scrape.center/login");
    curl_easy_setopt(curl, CURLOPT_POST, 1L);

    std::string post_fields = "username=" + username + "&password=" + password + "&captcha=" + captcha;
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_fields.c_str());

    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);

    if (res != CURLE_OK) {
        std::cerr << "登录失败: " << curl_easy_strerror(res) << std::endl;
    } else {
        std::cout << "登录成功" << std::endl;
    }
}

}
5. 主程序
整合上述代码，创建主程序：

cpp

int main() {
const std::string captcha_url = "https://captcha7.scrape.center/captcha.png";
const std::string captcha_path = "captcha.png";

// 下载验证码
download_captcha(captcha_url, captcha_path);

// 识别验证码
std::string captcha_text = recognize_captcha(captcha_path);
std::cout << "识别结果: " << captcha_text << std::endl;

// 登录
login("admin", "admin", captcha_text);

return 0;

}