df-helper 0.2.26

use std::io::{Read, Write};
use std::net::{TcpListener, TcpStream};
use std::thread;
use json::{array, JsonValue, object};
use crate::cryptos;
use crate::datetime::datetime;
use crate::datetime::timestamp::timestamp;
use crate::files::file::{file_content_get_stream, file_content_put, is_file, remove};
use crate::tools::string;


/// 跨域
pub struct Cors {
    allow_origin: String,
    allow_methods: String,
    allow_headers: String,
    allow_credentials: bool,
    max_age: i32,
}

impl Cors {
    /// 默认
    pub fn default() -> Self {
        Self {
            allow_origin: "*".to_string(),
            allow_methods: "*".to_string(),
            allow_headers: "*".to_string(),
            allow_credentials: true,
            max_age: 0,
        }
    }
    /// 设置限制域名
    pub fn allow_origin(mut self, origin: &str) -> Self {
        self.allow_origin = origin.to_string();
        self
    }

    /// 设置请求类型
    pub fn allow_methods(mut self, methods: &str) -> Self {
        self.allow_methods = methods.to_string();
        self
    }
    /// 设置请求头允许的字段
    pub fn allow_headers(mut self, headers: &str) -> Self {
        self.allow_headers = headers.to_string();
        self
    }
    /// 设置请求头允许Cookie
    pub fn allow_credentials(mut self, open: bool) -> Self {
        self.allow_credentials = open;
        self
    }
    /// 设置缓存周期
    pub fn max_age(mut self, int: i32) -> Self {
        self.max_age = int;
        self
    }
}

/// 响应
struct Response {
    stream: TcpStream,
    public: String,
    header: JsonValue,
    get: JsonValue,
    post: JsonValue,
    files: JsonValue,
    cors: Cors,
}

impl Response {
    /// 默认
    pub fn default(stream: TcpStream, cors: JsonValue, public: String) -> Self {
        let cors = Cors::default()
            .allow_origin(cors["allow_origin"].as_str().unwrap())
            .allow_methods(cors["allow_methods"].as_str().unwrap())
            .allow_headers(cors["allow_headers"].as_str().unwrap())
            .allow_credentials(cors["allow_credentials"].as_bool().unwrap())
            .max_age(cors["max_age"].as_i32().unwrap());
        Self {
            stream,
            public,
            header: object! {},
            get: object! {},
            post: object! {},
            files: object! {},
            cors,
        }
    }
    /// 监听
    pub fn handle(&mut self, fun: fn(response: JsonValue) -> (JsonValue, i32, String)) {
        let mut buf: Vec<u8> = vec![];
        // 第一次加载
        let mut buffer = [0; 1024];
        let count = self.stream.read(&mut buffer).unwrap();
        buf = [buf, buffer[0..count].to_vec()].concat();
        let data_length = buf.len();
        self._header(buf.clone());

        // 判断是否检查请求
        if self.header["method"].as_str().unwrap() == "OPTIONS" {
            self._options();
            return;
        }
        // 检查是否是文件路径
        let file = format!("{}{}", self.public, self.header["uri"].as_str().unwrap());
        if is_file(file.as_str()) {
            self._file_html(file.as_str());
            return;
        }
        let body_length = self.header["content-length"].as_usize().unwrap();
        let header_length = self.header["header_length"].as_usize().unwrap();
        let mut mun = data_length - header_length;
        // 检查是否完整
        while mun < body_length {
            let mut buffer = [0; 1024];
            let count = self.stream.read(&mut buffer).unwrap();
            mun += count;
            buf = [buf, buffer[0..count].to_vec()].concat();
        };
        let body = buf[header_length..].to_owned();
        self._body(body.clone());

        let response = object! {
            header:self.header.clone(),
            post:self.post.clone(),
            get:self.get.clone(),
            files:self.files.clone()
        };
        let (contents, code, content_type) = fun(response);
        self.write(contents, code, content_type);
        // 清理temp临时缓存文件
        for (_, files) in self.files.entries_mut() {
            for item in files.members() {
                if is_file(item["temp"].as_str().unwrap()) {
                    // println!("删除文件:{}", item["temp"]);
                    remove(item["temp"].as_str().unwrap());
                }
            }
        }
    }
    /// 头部信息处理
    fn _header(&mut self, data: Vec<u8>) {
        let data = String::from_utf8(data.to_vec()).unwrap();
        let list = string::split(data, "\r\n\r\n");
        let data = list[0].to_string();
        let headers = string::split(data.clone(), "\r\n");
        let list = string::split(headers[0].to_string(), " ");
        self.header["header_length"] = (data.len() + 4).into();
        self.header["method"] = list[0].clone();
        self.header["uri"] = list[1].clone();
        self.header["version"] = list[2].clone();
        self._query(self.header["uri"].to_string());
        for header in headers.members() {
            let list = string::split(header.to_string(), ": ");
            if list.len() == 2 {
                self.header[list[0].to_string().to_lowercase().as_str()] = list[1].clone();
                continue;
            }
        }
        self.header["content-type"] = self._content_type(self.header["content-type"].to_string(), self.header["accept"].to_string()).into();
        self.header["content-length"] = self.header["content-length"].to_string().parse::<i32>().unwrap_or(0).into();
    }
    /// 内容处理
    fn _body(&mut self, data: Vec<u8>) {
        match self.header["content-type"].as_str().unwrap() {
            "multipart/form-data" => {
                self._multipart(data.clone());
            }
            "application/x-www-form-urlencoded" => {
                let text = String::from_utf8(data.clone()).unwrap();
                let text = string::split(text.to_string(), "&");
                for item in text.members() {
                    let row = string::split(item.to_string(), "=");
                    self.post[row[0].clone().as_str().unwrap()] = row[1].clone();
                }
            }
            "application/json" => {
                let text = String::from_utf8(data).unwrap();
                let length = self.header["content-length"].to_string().parse::<usize>().unwrap();
                if length == 0 {
                    return;
                }
                self.post = json::parse(&*text.clone()).unwrap();
            }
            _ => {
                // println!(">>>>>>> >>>>>>");
                // println!("{}", data);
                // println!(">>>>>>> >>>>>>");
            }
        }
    }
    /// 数据提取
    fn _multipart(&mut self, data: Vec<u8>) {
        let boundary = self.header["boundary"].as_str().unwrap();
        let text = unsafe { String::from_utf8_unchecked(data.clone()) };
        let text = text.trim_start_matches("\r\n");
        let text = text.trim_end_matches(format!("\r\n--{}--\r\n", boundary.clone()).as_str()).to_string();

        let fg = format!("--{}\r\n", boundary.clone());
        let list = string::split(text.clone(), fg.as_str().clone());
        let mut index = 0;
        let mut body = data[2 + fg.len()..].to_vec();
        while index < list.len() {
            let item = list[index].to_string();
            let item = item.trim_start_matches(boundary.clone());
            let len = item.len();
            if len == 0 {
                index += 1;
                continue;
            }
            let mode = string::search(item, "filename=");
            match mode {
                false => {
                    let row = string::split(item.to_string(), "\r\n\r\n");
                    let field = string::split(row[0].to_string(), "\"");
                    let name = field[1].as_str().unwrap();
                    let row = string::split(row[1].to_string(), "\r\n");
                    let value = string::split(row[0].to_string(), "\"");
                    let value = value[0].clone();
                    self.post[name] = value.clone();
                }
                true => {
                    let text = string::split(item.to_string(), "\r\n\r\n");
                    let body = text[1].to_string();
                    let file = body.as_str().trim_start_matches("\u{0}");
                    let text = text[0].clone();
                    let text = string::split(text.to_string(), "\r\n");
                    let name = string::split(text[0].to_string(), "\"");
                    let types = string::split(text[1].to_string(), ": ");
                    let types = types[1].as_str().unwrap();
                    let field = name[1].as_str().unwrap();
                    let filename = name[3].as_str().unwrap();
                    fn _content_type_mode(data: &str) -> String {
                        match data {
                            "image/png" => "png",
                            "image/jpeg" => "jpeg",
                            "image/jpg" => "jpg",
                            _ => "txt"
                        }.to_string().clone()
                    }
                    let mut file_data = object! {};
                    file_data["type"] = types.into();
                    file_data["name"] = filename.into();
                    file_data["size"] = file.len().into();
                    file_data["sha"] = cryptos::sha::to_sha1(file.clone()).into();
                    file_data["mode"] = json::JsonValue::String(_content_type_mode(types.clone()).clone());
                    let temp_file = format!("{}.{}", timestamp("ms").to_string(), file_data["mode"]);
                    let filename = format!("{}/../temp/{}", self.public, temp_file);
                    file_data["temp"] = filename.clone().into();
                    file_content_put(&*filename, file.clone());
                    if self.files[field].is_empty() {
                        self.files[field] = array![file_data];
                    } else {
                        self.files[field].push(file_data).unwrap();
                    }
                }
            }
            index += 1;
            if index == list.len() {} else {
                body = body[len + fg.len()..].to_vec();
            }
        }
    }

    /// 请求类型
    fn _content_type(&mut self, data: String, accept: String) -> String {
        if string::search(data.to_lowercase().as_str(), "text/html") {
            return "text/html".to_string();
        }
        if string::search(data.to_lowercase().as_str(), "text/xml") {
            return "text/xml".to_string();
        }
        if string::search(data.to_lowercase().as_str(), "application/json") {
            return "application/json".to_string();
        }
        if string::search(data.to_lowercase().as_str(), "multipart/form-data") {
            let ttt = string::split(data, "boundary=");
            self.header["boundary"] = ttt[1].clone();
            return "multipart/form-data".to_string();
        }
        if string::search(data.to_lowercase().as_str(), "application/x-www-form-urlencoded") {
            return "application/x-www-form-urlencoded".to_string();
        }
        if string::search(data.to_lowercase().as_str(), "text/plain") {
            return "text/plain".to_string();
        }
        if data.is_empty() {
            if string::search(accept.to_lowercase().as_str(), "image/*") {
                return "image/*".to_string();
            }
            if string::search(accept.to_lowercase().as_str(), "image/webp") {
                return "image/*".to_string();
            }
            if string::search(accept.to_lowercase().as_str(), "image/gif") {
                return "image/gif".to_string();
            }
        }
        // println!("请求类型:{}", data);
        return "text/plain".to_string();
    }
    /// get参数处理
    fn _query(&mut self, data: String) {
        let query = string::split(data, "?");
        let query = query[1].clone();
        if query.is_empty() {
            return;
        }
        let query = string::split(query.to_string(), "&");
        let mut list = object! {};
        for item in query.members() {
            let row = string::split(item.to_string(), "=");
            let key = row[0].clone();
            let value = row[1].clone();
            list[key.as_str().unwrap()] = value.into();
        }
        self.get = list;
    }
    /// 读取文件返回
    fn _file_html(&mut self, filename: &str) {
        let name = string::split(filename.to_string(), "/");
        let name = name[name.len() - 1].as_str().unwrap();
        let sufxx = string::split(filename.to_string(), ".");
        let sufxx = sufxx[sufxx.len() - 1].as_str().unwrap();
        let contents = file_content_get_stream(filename);
        let crlf = "\r\n";
        let status = format!("HTTP/1.1 200 OK{}", crlf);
        let date = format!("Date: {}{}", datetime::to_gmt(), crlf);
        let server = format!("Server: Rust{}", crlf);
        let content_length = format!("Content-Length: {}{}", contents.len(), crlf);
        let content_disposition = match sufxx {
            "html" => {
                format!("")
            }
            _ => {
                format!("Content-Disposition: attachment; filename={}{}", name, crlf)
            }
        };
        let content_type = match sufxx {
            "jpg" => {
                format!("content-type:image/jpg{}", crlf)
            }
            "png" => {
                format!("content-type:image/png{}", crlf)
            }
            "bmp" => {
                format!("content-type:image/bmp{}", crlf)
            }
            "jpeg" => {
                format!("content-type:image/jpeg{}", crlf)
            }
            "svg" => {
                format!("content-type:image/svg{}", crlf)
            }
            "webp" => {
                format!("content-type:image/webp{}", crlf)
            }
            "ico" => {
                format!("content-type:image/ico{}", crlf)
            }
            "gif" => {
                format!("content-type:image/gif{}", crlf)
            }
            _ => {
                format!("content-type: text/plain;charset=utf-8{}", crlf)
            }
        };
        let response = format!("{}{}{}{}{}{}{}{}", status, date, server, content_disposition, content_type, content_length, crlf, contents);
        self.stream.write_all(response.as_bytes()).unwrap();
        self.stream.flush().unwrap();
    }
    fn _options(&mut self) {
        let crlf = "\r\n";
        let status = format!("HTTP/1.1 200 OK{}", crlf);
        let date = format!("Date: {}{}", datetime::to_gmt(), crlf);
        let server = format!("Server: Rust{}", crlf);
        let allow_origin = format!("Access-Control-Allow-Origin: {}{}", self.cors.allow_origin, crlf);
        let allow_methods = format!("Access-Control-Allow-Methods: {}{}", self.cors.allow_methods, crlf);
        let allow_headers = format!("Access-Control-Allow-Headers: {}{}", self.cors.allow_headers, crlf);
        let max_age = format!("Access-Control-Max-Age: {}{}", self.cors.max_age, crlf);
        let allow_credentials = format!("Access-Control-Allow-Credentials: {}{}", self.cors.allow_credentials, crlf);

        let response = format!("{}{}{}{}{}{}{}{}{}",
                               status, date, server,
                               allow_origin,
                               allow_methods,
                               allow_credentials,
                               max_age,
                               allow_headers,
                               crlf);
        self.stream.write(response.as_bytes()).unwrap();
        self.stream.flush().unwrap();
    }
    /// 将响应写出到流
    fn write(&mut self, contents: JsonValue, code: i32, content_type: String) {
        let crlf = "\r\n";
        let status = format!("HTTP/1.1 {} {}{}", code, "OK", crlf);
        let content_type = {
            match content_type.as_str() {
                "json" => {
                    format!("content-type: application/json;charset=utf-8{}", crlf)
                }
                _ => {
                    format!("content-type: text/html;charset=utf-8{}", crlf)
                }
            }
        };
        let access_control_allow_origin = format!("Access-Control-Allow-Origin: *{}", crlf);
        let content_length = format!("Content-Length: {}{}", contents.to_string().as_bytes().len(), crlf);
        let response = format!("{}{}{}{}{}{}", status, content_type, access_control_allow_origin, content_length, crlf, contents);
        self.stream.write(response.as_bytes()).unwrap();
        self.stream.flush().unwrap();
    }
}

pub struct Web {
    ip: String,
    /// 本地路径
    public: String,
}

impl Web {
    pub fn bind(ip: &str, public: &str) -> Self {
        Self {
            ip: ip.to_string(),
            public: public.to_string(),
        }
    }
    /// 运行
    pub fn run(&mut self, cors: JsonValue, handle: fn(response: JsonValue) -> (JsonValue, i32, String)) {
        let listener = TcpListener::bind(self.ip.as_str()).unwrap();
        for stream in listener.incoming() {
            let cors = cors.clone();
            let public = self.public.clone();
            let stream = stream.unwrap();
            thread::spawn(move || Response::default(stream, cors, public).handle(handle));
        }
    }
}