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use crate::{errors::*, properties::Properties}; use crate::transport::Transport; use crate::tcp::TcpTransport; use crate::ssl::SslTransport; use crate::protocol::{MessageType, ReplyData, RequestData, Identity, Encapsulation}; use crate::encoding::FromBytes; use pest::Parser; #[derive(Parser)] #[grammar = "proxystring.pest"] pub struct ProxyParser; pub struct Proxy { pub transport: Box<dyn Transport + 'static>, pub request_id: i32, pub ident: String, pub host: String, pub port: i32 } impl Proxy { pub fn new(proxy_string: &str, properties: &Properties) -> Result<Proxy, Box<dyn std::error::Error>> { let mut ident = ""; let mut protocol = ""; let mut host = ""; let mut port = ""; let result = ProxyParser::parse(Rule::proxystring, proxy_string)?.next().unwrap(); for pair in result.into_inner() { match pair.as_rule() { Rule::ident => { ident = pair.as_str(); } Rule::endpoint => { for child in pair.into_inner() { match child.as_rule() { Rule::endpoint_protocol => { protocol = child.as_str(); } Rule::endpoint_host | Rule::endpoint_port => { for item in child.into_inner() { match item.as_rule() { Rule::hostname | Rule::ip => { host = item.as_str(); } Rule::port => { port = item.as_str(); } _ => return Err(Box::new(ParsingError::new(&format!("Unexpected proxy string rule: {:?}", item.as_rule())))) }; } } _ => return Err(Box::new(ParsingError::new(&format!("Unexpected proxy string rule: {:?}", child.as_rule())))) }; } } Rule::EOI => {} _ => return Err(Box::new(ParsingError::new("Unexpected rule while parsing proxy string."))) }; } let address = &(host.to_owned() + ":" + port); match protocol { "default" | "tcp" => { Ok(Proxy { transport: Box::new(TcpTransport::new(address)?), request_id: 0, ident: String::from(ident), host: String::from(host), port: port.parse()? }) } "ssl" => { Ok(Proxy { transport: Box::new(SslTransport::new(address, properties)?), request_id: 0, ident: String::from(ident), host: String::from(host), port: port.parse()? }) } _ => return Err(Box::new(ProtocolError::new(&format!("Unsupported protocol: {}", protocol)))) } } pub fn create_request(&mut self, identity_name: &str, operation: &str, mode: u8, params: &Encapsulation) -> RequestData { self.request_id = self.request_id + 1; RequestData { request_id: self.request_id, id: Identity::new(identity_name), facet: Vec::new(), operation: String::from(operation), mode: mode, context: std::collections::HashMap::new(), params: params.clone() } } pub fn make_request<T: 'static + std::fmt::Debug + std::fmt::Display + FromBytes>(&mut self, request: &RequestData) -> Result<ReplyData, Box<dyn std::error::Error>> { self.transport.make_request(request)?; let reply = self.transport.read_message()?; match reply { MessageType::Reply(_header, reply) => { match reply.status { 1 => { let mut read = 0; Err(Box::new(UserError { exception: T::from_bytes(&reply.body.data, &mut read)? })) } _ => Ok(reply) } }, _ => Err(Box::new(ProtocolError::new(&format!("Unsupported message type: {:?}", reply)))) } } }