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1.Remove an unnecessary null pointer check
2.Fix a compilation error for older g++
3.Update README.md
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antao
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README.md
30
README.md
@ -67,20 +67,22 @@ int main()
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Drogon provides some interfaces for adding controller logic directly in the main() function, for example, user can register a handler like this in Drogon:
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```c++
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app.registerHttpMethod("/test",
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[=](const HttpRequestPtr& req,
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const std::function<void (const HttpResponsePtr &)> & callback)
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{
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Json::Value json;
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json["result"]="ok";
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auto resp=HttpResponse::newHttpJsonResponse(json);
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callback(resp);
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},
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{Get,"LoginFilter"});
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app.registerHttpMethod("/test?username={1}",
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[](const HttpRequestPtr& req,
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const std::function<void (const HttpResponsePtr &)> & callback,
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const std::string &name)
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{
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Json::Value json;
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json["result"]="ok";
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json["message"]=std::string("hello,")+name;
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auto resp=HttpResponse::newHttpJsonResponse(json);
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callback(resp);
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},
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{Get,"LoginFilter"});
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```
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In a scene with dozens of path handlers, isn't it better to disperse them in their respective classes? So unless your logic is very simple, we don't recommend using above interfaces. Instead, we create an HttpSimpleController as follows:
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While such interfaces look intuitive, they are not suitable for complex business logic scenarios. Assuming there are tens or even hundreds of handlers that need to be registered in the framework, isn't it a better practice to implement them separately in their respective classes? So unless your logic is very simple, we don't recommend using above interfaces. Instead, we can create an HttpSimpleController as follows:
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```c++
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/// The TestCtrl.h file
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@ -157,7 +159,7 @@ class User : public drogon::HttpController<User>
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METHOD_LIST_BEGIN
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//use METHOD_ADD to add your custom processing function here;
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METHOD_ADD(User::getInfo, "/{1}", Get); //path is /api/v1/User/{arg1}
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METHOD_ADD(User::getDetailInfo, "/{1}/detailinfo, Get); //path is /api/v1/User/{arg1}/detailinfo
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METHOD_ADD(User::getDetailInfo, "/{1}/detailinfo", Get); //path is /api/v1/User/{arg1}/detailinfo
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METHOD_ADD(User::newUser, "/{1}", Post); //path is /api/v1/User/{arg1}
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METHOD_LIST_END
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//your declaration of processing function maybe like this:
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@ -174,6 +176,8 @@ class User : public drogon::HttpController<User>
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} // namespace api
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```
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As you can see, users can use the `HttpController` to map paths and parameters at the same time. This is a very convenient way to create a RESTful API application.
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As you can see, users can use the `HttpController` to map paths and parameters at the same time. This is a very convenient way to create a RESTful API application.
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In addition, you can also find that all handler interfaces are in asynchronous mode, where the response is returned by a callback object. This design is for performance reasons because in asynchronous mode the drogon application can handle a large number of concurrent requests with a small number of threads.
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After compiling all of the above source files, we get a very simple web application. This is a good start. **for more information, please visit the [wiki](https://github.com/an-tao/drogon/wiki) site**
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@ -4,7 +4,7 @@
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void PipelineTest::asyncHandleHttpRequest(const HttpRequestPtr &req, const std::function<void(const HttpResponsePtr &)> &callback)
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{
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static std::atomic<int> counter = 0;
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static std::atomic<int> counter{0};
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int c = counter.fetch_add(1);
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double delay = ((double)(10 - (c % 10))) / 10.0;
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trantor::EventLoop::getEventLoopOfCurrentThread()->runAfter(delay, [c, callback]() {
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@ -13,4 +13,4 @@ void PipelineTest::asyncHandleHttpRequest(const HttpRequestPtr &req, const std::
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resp->setBody(std::move(str));
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callback(resp);
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});
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}
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}
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@ -16,7 +16,7 @@
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#include <math.h>
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#include <string.h>
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#include <iostream>
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// 幻数定义
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const int Md5Encode::kA = 0x67452301;
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const int Md5Encode::kB = 0xefcdab89;
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const int Md5Encode::kC = 0x98badcfe;
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@ -25,9 +25,9 @@ const int Md5Encode::kD = 0x10325476;
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const unsigned long long Md5Encode::k_ti_num_integer = 4294967296;
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// function: CycleMoveLeft
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// @param src_num:要左移的数
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// @param bit_num_to_move:要移动的bit位数
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// @return 循环左移后的结果数
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// @param src_num: the number to be moved left
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// @param bit_num_to_move: the number of bit of moving
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// @return result after moving
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UInt32 Md5Encode::CycleMoveLeft(UInt32 src_num, int bit_num_to_move)
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{
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UInt32 src_num1 = src_num;
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@ -43,10 +43,10 @@ UInt32 Md5Encode::CycleMoveLeft(UInt32 src_num, int bit_num_to_move)
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}
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// function: FillData
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// @param in_data_ptr: 要加密的信息数据
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// @param data_byte_len: 数据的字节数
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// @param out_data_ptr: 填充必要信息后的数据
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// return : 填充信息后的数据长度,以字节为单位
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// @param in_data_ptr: input data
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// @param data_byte_len: length of input data
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// @param out_data_ptr: output data
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// return : length of output data
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UInt32 Md5Encode::FillData(const char *in_data_ptr, int data_byte_len, char **out_data_ptr)
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{
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int bit_num = data_byte_len * BIT_OF_BYTE;
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@ -60,7 +60,7 @@ UInt32 Md5Encode::FillData(const char *in_data_ptr, int data_byte_len, char **ou
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}
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else
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{
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bit_need_fill = (BIT_OF_GROUP - SRC_DATA_LEN) - mod_bit_num; // 这里多加了一个BIT_OF_GROUP，避免bit_need_fill正好等于0,暂时不加
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bit_need_fill = (BIT_OF_GROUP - SRC_DATA_LEN) - mod_bit_num;
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}
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int all_bit = bit_num + bit_need_fill;
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if (0 < bit_need_fill)
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@ -209,14 +209,13 @@ void Md5Encode::RotationCalculate(char *data_512_ptr, ParamDynamic ¶m)
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param.vd_last_ = param.ud_;
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}
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// 转换成十六进制字符串输出
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// Convert to hex format string
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std::string Md5Encode::GetHexStr(unsigned int num_str)
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{
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std::string hexstr = "";
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char szch[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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unsigned char *tmptr = (unsigned char *)&num_str;
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int len = sizeof(num_str);
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// 小端字节序，逆序打印
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for (int i = 0; i < len; i++)
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{
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unsigned char ch = tmptr[i] & 0xF0;
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@ -229,8 +228,8 @@ std::string Md5Encode::GetHexStr(unsigned int num_str)
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}
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// function: Encode
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// @param src_info:要加密的信息
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// return :加密后的MD5值
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// @param src_info: the string to be encoded.
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// return : the string after encoding
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std::string Md5Encode::encode(const std::string &src_info)
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{
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ParamDynamic param;
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@ -253,10 +252,7 @@ std::string Md5Encode::encode(const std::string &src_info)
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data_BIT_OF_GROUP += i * (BIT_OF_GROUP / BIT_OF_BYTE);
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RotationCalculate(data_BIT_OF_GROUP, param);
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}
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if (NULL != out_data_ptr)
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{
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delete[] out_data_ptr, out_data_ptr = NULL;
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}
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delete[] out_data_ptr, out_data_ptr = NULL;
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result.append(GetHexStr(param.ua_));
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result.append(GetHexStr(param.ub_));
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result.append(GetHexStr(param.uc_));
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