1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
use crate::authenticators::Authenticate;
use crate::back::dispatcher::Dispatcher;
use crate::front::listener::Connection;
use derivative::Derivative;
use log::{info, trace};
use parsec_interface::requests::AuthType;
use parsec_interface::requests::ResponseStatus;
use parsec_interface::requests::{Request, Response};
use std::collections::HashMap;
use std::io::{Error, ErrorKind, Result};
#[derive(Derivative)]
#[derivative(Debug)]
pub struct FrontEndHandler {
dispatcher: Dispatcher,
#[derivative(Debug = "ignore")]
authenticators: HashMap<AuthType, Box<dyn Authenticate + Send + Sync>>,
body_len_limit: usize,
}
impl FrontEndHandler {
pub fn handle_request(&self, mut connection: Connection) {
trace!("handle_request ingress");
let request = match Request::read_from_stream(&mut connection.stream, self.body_len_limit) {
Ok(request) => request,
Err(status) => {
format_error!("Failed to read request", status);
let response = Response::from_status(status);
if let Err(status) = response.write_to_stream(&mut connection.stream) {
format_error!("Failed to write response", status);
}
return;
}
};
let (app_name, err_response) = if AuthType::NoAuth == request.header.auth_type {
(None, None)
} else if let Some(authenticator) = self.authenticators.get(&request.header.auth_type) {
match authenticator.authenticate(&request.auth, connection.metadata) {
Ok(app_name) => (Some(app_name), None),
Err(status) => (
None,
Some(Response::from_request_header(request.header, status)),
),
}
} else {
(
None,
Some(Response::from_request_header(
request.header,
ResponseStatus::AuthenticatorNotRegistered,
)),
)
};
let response = if let Some(err_response) = err_response {
err_response
} else {
if crate::utils::GlobalConfig::log_error_details() {
if let Some(app_name_string) = app_name.clone() {
info!(
"New request received from application name \"{}\"",
app_name_string
)
} else {
info!("New request received without authentication")
}
};
let response = self.dispatcher.dispatch_request(request, app_name.clone());
trace!("dispatch_request egress");
response
};
match response.write_to_stream(&mut connection.stream) {
Ok(_) => {
if crate::utils::GlobalConfig::log_error_details() {
if let Some(app_name_string) = app_name {
info!(
"Response for application name \"{}\" sent back",
app_name_string
);
} else {
info!("Response sent back from request without authentication");
}
}
}
Err(err) => format_error!("Failed to send response", err),
}
}
}
#[derive(Default, Derivative)]
#[derivative(Debug)]
pub struct FrontEndHandlerBuilder {
dispatcher: Option<Dispatcher>,
#[derivative(Debug = "ignore")]
authenticators: Option<HashMap<AuthType, Box<dyn Authenticate + Send + Sync>>>,
body_len_limit: Option<usize>,
}
impl FrontEndHandlerBuilder {
pub fn new() -> Self {
FrontEndHandlerBuilder {
dispatcher: None,
authenticators: None,
body_len_limit: None,
}
}
pub fn with_dispatcher(mut self, dispatcher: Dispatcher) -> Self {
self.dispatcher = Some(dispatcher);
self
}
pub fn with_authenticator(
mut self,
auth_type: AuthType,
authenticator: Box<dyn Authenticate + Send + Sync>,
) -> Self {
match &mut self.authenticators {
Some(authenticators) => {
let _ = authenticators.insert(auth_type, authenticator);
}
None => {
let mut map = HashMap::new();
let _ = map.insert(auth_type, authenticator);
self.authenticators = Some(map);
}
};
self
}
pub fn with_body_len_limit(mut self, body_len_limit: usize) -> Self {
self.body_len_limit = Some(body_len_limit);
self
}
pub fn build(self) -> Result<FrontEndHandler> {
Ok(FrontEndHandler {
dispatcher: self
.dispatcher
.ok_or_else(|| Error::new(ErrorKind::InvalidData, "dispatcher is missing"))?,
authenticators: self
.authenticators
.ok_or_else(|| Error::new(ErrorKind::InvalidData, "authenticators is missing"))?,
body_len_limit: self
.body_len_limit
.ok_or_else(|| Error::new(ErrorKind::InvalidData, "body_len_limit is missing"))?,
})
}
}