barehttp 0.0.1

A minimal, explicit HTTP client for Rust with no_std support and blocking I/O
Documentation 
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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342

/// Comprehensive test suite for RFC 9112 compliance validation
/// Tests all edge cases and validation rules added to prevent future regressions
use crate::parser::RequestBuilder;
extern crate alloc;

// ============================================================================
// RFC 9112 Section 3.2: Multiple Host Header Detection
// ============================================================================

#[test]
fn test_rfc9112_reject_multiple_host_headers() {
  // RFC 9112 Section 3.2: Server responds 400 if multiple Host headers present
  let mut builder = RequestBuilder::new("GET", "/");
  builder = builder.header("Host", "example.com");
  builder = builder.header("Host", "another.com");

  let result = builder.build();
  assert!(result.is_err(), "Should reject multiple Host headers");
  assert_eq!(result.unwrap_err(), crate::error::ParseError::MultipleHostHeaders);
}

#[test]
fn test_rfc9112_single_host_header_accepted() {
  // Single Host header should be accepted
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com");

  let result = builder.build();
  assert!(result.is_ok(), "Single Host header should be accepted");
}

#[test]
fn test_rfc9112_case_insensitive_host_detection() {
  // Host header detection should be case-insensitive
  let mut builder = RequestBuilder::new("GET", "/");
  builder = builder.header("Host", "example.com");
  builder = builder.header("host", "another.com");

  let result = builder.build();
  assert!(result.is_err(), "Should detect duplicate Host regardless of case");
}

// ============================================================================
// RFC 9112 Section 3.2: Host Header Value Validation
// ============================================================================

#[test]
fn test_rfc9112_valid_host_hostname_only() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com");

  assert!(builder.build().is_ok(), "Valid hostname should be accepted");
}

#[test]
fn test_rfc9112_valid_host_with_port() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com:8080");

  assert!(builder.build().is_ok(), "Valid hostname with port should be accepted");
}

#[test]
fn test_rfc9112_valid_host_ipv4() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "192.168.1.1");

  assert!(builder.build().is_ok(), "IPv4 address should be accepted");
}

#[test]
fn test_rfc9112_valid_host_ipv4_with_port() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "192.168.1.1:8080");

  assert!(builder.build().is_ok(), "IPv4 with port should be accepted");
}

#[test]
fn test_rfc9112_valid_host_ipv6_literal() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "[2001:db8::1]");

  assert!(builder.build().is_ok(), "IPv6 literal should be accepted");
}

#[test]
fn test_rfc9112_valid_host_ipv6_with_port() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "[2001:db8::1]:8080");

  assert!(builder.build().is_ok(), "IPv6 literal with port should be accepted");
}

#[test]
fn test_rfc9112_valid_host_empty() {
  // RFC 9112 Section 3.2: Empty Host is valid when authority is missing
  let builder = RequestBuilder::new("GET", "/").header("Host", "");

  assert!(builder.build().is_ok(), "Empty Host should be accepted");
}

#[test]
fn test_rfc9112_invalid_host_with_whitespace() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example .com");

  let result = builder.build();
  assert!(result.is_err(), "Host with whitespace should be rejected");
  assert_eq!(result.unwrap_err(), crate::error::ParseError::InvalidHostHeaderValue);
}

#[test]
fn test_rfc9112_invalid_host_port_zero() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com:0");

  let result = builder.build();
  assert!(result.is_err(), "Port 0 should be rejected");
}

#[test]
fn test_rfc9112_invalid_host_port_non_numeric() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com:abc");

  let result = builder.build();
  assert!(result.is_err(), "Non-numeric port should be rejected");
}

#[test]
fn test_rfc9112_invalid_host_empty_port() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com:");

  let result = builder.build();
  assert!(result.is_err(), "Empty port should be rejected");
}

#[test]
fn test_rfc9112_valid_host_subdomain() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "api.example.com");

  assert!(builder.build().is_ok(), "Subdomain should be accepted");
}

#[test]
fn test_rfc9112_valid_host_with_hyphen() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "my-server.example.com");

  assert!(builder.build().is_ok(), "Hostname with hyphen should be accepted");
}

// ============================================================================
// RFC 9112 Section 6.1: Transfer-Encoding Chunked Duplication Check
// ============================================================================

#[test]
fn test_rfc9112_reject_chunked_applied_multiple_times() {
  // RFC 9112 Section 6.1: MUST NOT apply chunked more than once
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "chunked, chunked");

  let result = builder.build();
  assert!(result.is_err(), "Should reject chunked applied multiple times");
  assert_eq!(
    result.unwrap_err(),
    crate::error::ParseError::ChunkedAppliedMultipleTimes
  );
}

#[test]
fn test_rfc9112_single_chunked_accepted() {
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "chunked");

  let result = builder.build();
  assert!(result.is_ok(), "Single chunked should be accepted");
}

#[test]
fn test_rfc9112_chunked_with_other_encoding() {
  // Chunked with another encoding (chunked must be last)
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "gzip, chunked");

  let result = builder.build();
  assert!(result.is_ok(), "Chunked as final encoding should be accepted");
}

#[test]
fn test_rfc9112_reject_chunked_in_middle() {
  // Chunked not as final encoding
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "chunked, gzip");

  // Note: This test validates that chunked appears only once
  // The "chunked must be final" validation is in response parsing
  let result = builder.build();
  assert!(result.is_ok(), "Single chunked occurrence is valid in request building");
}

#[test]
fn test_rfc9112_case_insensitive_chunked_detection() {
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "Chunked, CHUNKED");

  let result = builder.build();
  assert!(result.is_err(), "Should detect chunked case-insensitively");
}

// ============================================================================
// RFC 9112 Section 6.1: Transfer-Encoding with HTTP/1.1
// ============================================================================

#[test]
fn test_rfc9112_transfer_encoding_with_http11() {
  // We always use HTTP/1.1, so Transfer-Encoding is valid
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "chunked");

  let result = builder.build();
  assert!(result.is_ok(), "Transfer-Encoding valid with HTTP/1.1");
}

// ============================================================================
// Integration Tests: Multiple Validations
// ============================================================================

#[test]
fn test_rfc9112_multiple_validations_all_pass() {
  // Test that a valid request with multiple headers passes all validations
  let builder = RequestBuilder::new("POST", "/api/data")
    .header("Host", "api.example.com:443")
    .header("Content-Type", "application/json")
    .header("User-Agent", "TestClient/1.0")
    .body(b"{\"test\":\"data\"}".to_vec());

  let result = builder.build();
  assert!(result.is_ok(), "Valid request should pass all validations");
}

#[test]
fn test_rfc9112_multiple_violations_first_error_returned() {
  // Test that when multiple violations exist, we get an error
  let mut builder = RequestBuilder::new("POST", "/");
  builder = builder.header("Host", "example.com");
  builder = builder.header("Host", "another.com"); // Duplicate Host
  builder = builder.header("Transfer-Encoding", "chunked, chunked"); // Duplicate chunked

  let result = builder.build();
  assert!(result.is_err(), "Should reject request with multiple violations");
  // Should get MultipleHostHeaders first since it's checked earlier
  assert_eq!(result.unwrap_err(), crate::error::ParseError::MultipleHostHeaders);
}

// ============================================================================
// Edge Cases and Boundary Conditions
// ============================================================================

#[test]
fn test_rfc9112_host_max_length() {
  // Test very long but valid hostname
  let long_hostname = "a".repeat(253); // Max DNS label length
  let builder = RequestBuilder::new("GET", "/").header("Host", &long_hostname);

  let result = builder.build();
  assert!(result.is_ok(), "Long valid hostname should be accepted");
}

#[test]
fn test_rfc9112_host_port_max_value() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "example.com:65535");

  let result = builder.build();
  assert!(result.is_ok(), "Max port value should be accepted");
}

#[test]
fn test_rfc9112_host_localhost() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "localhost");

  assert!(builder.build().is_ok(), "localhost should be accepted");
}

#[test]
fn test_rfc9112_host_localhost_with_port() {
  let builder = RequestBuilder::new("GET", "/").header("Host", "localhost:8080");

  assert!(builder.build().is_ok(), "localhost with port should be accepted");
}

#[test]
fn test_rfc9112_transfer_encoding_empty_value() {
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "");

  let result = builder.build();
  // Empty Transfer-Encoding is technically invalid but won't trigger our chunked checks
  assert!(result.is_ok(), "Empty TE doesn't violate chunked duplication");
}

#[test]
fn test_rfc9112_transfer_encoding_whitespace_handling() {
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "  chunked  ");

  let result = builder.build();
  assert!(result.is_ok(), "Whitespace around chunked should be handled");
}

// ============================================================================
// Regression Prevention Tests
// ============================================================================

#[test]
fn test_rfc9112_regression_host_case_sensitivity() {
  // Ensure Host header checking remains case-insensitive
  let builder = RequestBuilder::new("GET", "/").header("HOST", "example.com");

  assert!(builder.build().is_ok(), "HOST (uppercase) should work");
}

#[test]
fn test_rfc9112_regression_multiple_non_host_headers() {
  // Ensure we don't accidentally reject multiple non-Host headers
  let mut builder = RequestBuilder::new("GET", "/");
  builder = builder.header("Host", "example.com");
  builder = builder.header("Accept", "text/html");
  builder = builder.header("Accept", "application/json");

  let result = builder.build();
  assert!(result.is_ok(), "Multiple non-Host headers should be allowed");
}

#[test]
fn test_rfc9112_regression_transfer_encoding_other_values() {
  // Ensure we don't reject non-chunked Transfer-Encoding values
  let builder = RequestBuilder::new("POST", "/")
    .header("Host", "example.com")
    .header("Transfer-Encoding", "gzip");

  let result = builder.build();
  assert!(result.is_ok(), "Non-chunked TE should be accepted");
}