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book: formatting style updates (#231)

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ReEcho
2022-07-17 19:29:30 +08:00
committed by GitHub
parent 41b88c861e
commit e50e3c64f2
10 changed files with 104 additions and 74 deletions
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book/zh-cn/06-regex.md
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@@ -94,7 +94,8 @@ C++11 提供的正则表达式库操作 `std::string` 对象，
int main() {
std::string fnames[] = {"foo.txt", "bar.txt", "test", "a0.txt", "AAA.txt"};
// 在 C++ 中 \ 会被作为字符串内的转义符，为使 \. 作为正则表达式传递进去生效，需要对 \ 进行二次转义，从而有 \\.
// 在 C++ 中 \ 会被作为字符串内的转义符，
// 为使 \. 作为正则表达式传递进去生效，需要对 \ 进行二次转义，从而有 \\.
std::regex txt_regex("[a-z]+\\.txt");
for (const auto &fname: fnames)
std::cout << fname << ": " << std::regex_match(fname, txt_regex) << std::endl;
@@ -103,7 +104,7 @@ int main() {
另一种常用的形式就是依次传入 `std::string`/`std::smatch`/`std::regex` 三个参数，
其中 `std::smatch` 的本质其实是 `std::match_results`。
在标准库中， `std::smatch` 被定义为了 `std::match_results<std::string::const_iterator>`，
故而在标准库的实现中， `std::smatch` 被定义为了 `std::match_results<std::string::const_iterator>`，
也就是一个子串迭代器类型的 `match_results`。
使用 `std::smatch` 可以方便的对匹配的结果进行获取，例如：
@@ -193,16 +194,23 @@ protected:
template<typename SERVER_TYPE>
void start_server(SERVER_TYPE &server) {
// process GET request for /match/[digit+numbers], e.g. GET request is /match/abc123, will return abc123
server.resource["fill_your_reg_ex"]["GET"] = [](ostream& response, Request& request) {
// process GET request for /match/[digit+numbers],
// e.g. GET request is /match/abc123, will return abc123
server.resource["fill_your_reg_ex"]["GET"] =
[](ostream& response, Request& request)
{
string number=request.path_match[1];
response << "HTTP/1.1 200 OK\r\nContent-Length: " << number.length() << "\r\n\r\n" << number;
response << "HTTP/1.1 200 OK\r\nContent-Length: "
<< number.length() << "\r\n\r\n" << number;
};
// peocess default GET request; anonymous function will be called if no other matches
// response files in folder web/
// peocess default GET request;
// anonymous function will be called
// if no other matches response files in folder web/
// default: index.html
server.default_resource["fill_your_reg_ex"]["GET"] = [](ostream& response, Request& request) {
server.default_resource["fill_your_reg_ex"]["GET"] =
[](ostream& response, Request& request)
{
string filename = "www/";
string path = request.path_match[1];