使用c++调用deepseek的api（附带源码）

deepseek的api申请地址

这边使用硅基流动的api，注册就有免费额度
硅基流动: link

使用格式

api的调用格式，ds的api调用就是用固定协议然后发送到对应服务器即可
然后解析json格式的文件。

让ds有记忆需要这样的格式发送数据，相当于把回答的和之前的问题合一起

测试效果

源码

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

using namespace Json;

static size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* response) {
    size_t total_size = size * nmemb;
    response->append((char*)contents, total_size);
    return total_size;
}

class ChatGPTClient {
public:
    ChatGPTClient(const std::string& api_key)
        : api_key_(api_key),
        endpoint_("https://api.siliconflow.cn/v1/chat/completions"),
        model_("deepseek-ai/DeepSeek-R1") {
        curl_ = curl_easy_init();
        // 初始化系统消息
        addSystemMessage(u8"你是一个乐于助人的AI助手,我发送的可能是gbk格式数据给你，你可能要自己转换");
    }

    ~ChatGPTClient() {
        if (curl_) curl_easy_cleanup(curl_);
    }

    void addSystemMessage(const std::string& content) {
        Value message;
        message["role"] = "system";
        message["content"] = content;
        history_.append(message);
    }

    std::string ask(const std::string& question) {
        if (!curl_) return "Error: CURL init failed";

        // 添加用户问题到历史
        Value userMessage;
        userMessage["role"] = "user";
        userMessage["content"] = question;
        history_.append(userMessage);

        // 构建请求体
        Value request;
        request["model"] = model_;
        request["messages"] = history_;
        request["temperature"] = 0.7;
        request["max_tokens"] = 4096;

        // 序列化
        StreamWriterBuilder writer;
        std::string post_data = writeString(writer, request);

        // 发送请求
        struct curl_slist* headers = nullptr;
        headers = curl_slist_append(headers, "Content-Type: application/json");
        headers = curl_slist_append(headers, ("Authorization: Bearer " + api_key_).c_str());

        std::string response_str;
        char error_buffer[CURL_ERROR_SIZE] = { 0 };

        curl_easy_setopt(curl_, CURLOPT_URL, endpoint_.c_str());
        curl_easy_setopt(curl_, CURLOPT_HTTPHEADER, headers);
        curl_easy_setopt(curl_, CURLOPT_POSTFIELDS, post_data.c_str());
        curl_easy_setopt(curl_, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl_, CURLOPT_WRITEDATA, &response_str);
        curl_easy_setopt(curl_, CURLOPT_ERRORBUFFER, error_buffer);
        curl_easy_setopt(curl_, CURLOPT_SSL_VERIFYPEER, 0L);

        CURLcode res = curl_easy_perform(curl_);
        curl_slist_free_all(headers);

        if (res != CURLE_OK) {
            return "CURL Error: " + std::string(error_buffer);
        }

        // 解析响应
        CharReaderBuilder reader;
        Value response_json;
        std::string parse_errors;

        std::istringstream response_stream(response_str);
        bool parse_ok = Json::parseFromStream(reader, response_stream, &response_json, &parse_errors);

        if (!parse_ok) return "JSON Error: " + parse_errors;

        if (response_json.isMember("error")) {
            return "API Error: " + response_json["error"]["message"].asString();
        }

        const Value& choices = response_json["choices"];
        if (!choices.empty() && choices[0].isMember("message")) {
            // 添加AI回复到历史
            Value assistantMessage = choices[0]["message"];
            history_.append(assistantMessage);
            return assistantMessage["content"].asString();
        }

        return "No valid response";
    }

private:
    CURL* curl_;
    std::string api_key_;
    std::string endpoint_;
    std::string model_;
    Value history_;  // 使用JSON数组存储对话历史
};

int main() {


    ChatGPTClient client("填key");

    while (true) {
        std::cout << "You: ";
        std::string input;
        std::getline(std::cin, input);
        if (input == "exit") break;

        std::cout << "AI: " << client.ask(input) << "\n\n";
    }
    return 0;
}

要下载
jsoncpp和ucrl
https://github.com/open-source-parsers/jsoncpp
https://github.com/curl/curl
编译参考这个文章，和libevent的编译流程一样
https://blog.csdn.net/m0_54069809/article/details/147250776?spm=1001.2014.3001.5502