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
|
#include "http_server.h"
#include <stdlib.h>
#include <string.h>
#include "freertos/semphr.h"
#include "param.h"
#define TAG "httpd"
#define STATE_PARAM(typ, attr, ...) \
static esp_err_t handle_set_##attr(httpd_req_t* req) \
{ \
ESP_LOGI(TAG, "Handling [%s] (%s)", #attr, req->uri); \
ws_params_t* params = (ws_params_t*)req->user_ctx; \
httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*"); \
ws_state_t snapshot; \
if (xSemaphoreTake(params->state_lock, portMAX_DELAY) != pdTRUE) { \
httpd_resp_send_err( \
req, HTTPD_500_INTERNAL_SERVER_ERROR, "lock failed"); \
return ESP_FAIL; \
} \
http_handle(typ)(req, ¶ms->state.attr); \
snapshot = params->state; \
xSemaphoreGive(params->state_lock); \
ws_state_save(&snapshot); \
httpd_resp_send(req, NULL, 0); \
return ESP_OK; \
} \
static httpd_uri_t http_##attr##_handler = { \
.uri = "/" #attr, \
.method = HTTP_POST, \
.handler = handle_set_##attr, \
.user_ctx = NULL};
#include "state_params.i"
#undef STATE_PARAM
static esp_err_t handle_get_params(httpd_req_t* req)
{
httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
size_t len = NUMBER_PARAMS * 128;
char out_buffer[len + 1];
out_buffer[len] = 0;
char* out_ptr = out_buffer;
ws_params_t* ws_params = (ws_params_t*)req->user_ctx;
ws_state_t snapshot;
if (xSemaphoreTake(ws_params->state_lock, portMAX_DELAY) != pdTRUE) {
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "lock failed");
return ESP_FAIL;
}
snapshot = ws_params->state;
xSemaphoreGive(ws_params->state_lock);
bool write_comma = false;
httpd_resp_set_type(req, "application/json");
if (len > 1) {
*out_ptr = '{';
out_ptr++;
len--;
}
#define STATE_PARAM(typ, attr, display, ...) \
if (write_comma && len > 1) { \
*(out_ptr++) = ','; \
len--; \
} \
len = serialize_to_json(typ)(&out_ptr, len, #attr, display, snapshot.attr); \
write_comma = true;
#include "state_params.i"
#undef STATE_PARAM
if (len > 3) {
*(out_ptr++) = '}';
len--;
*(out_ptr++) = '\r';
len--;
*(out_ptr++) = '\n';
len--;
}
if (len > 1) {
*(out_ptr++) = 0;
len--;
}
httpd_resp_set_status(req, HTTPD_200);
httpd_resp_send(req, out_buffer, strlen(out_buffer));
return ESP_OK;
}
static httpd_uri_t http_params_get_handler = {
.uri = "/params",
.method = HTTP_GET,
.handler = handle_get_params,
.user_ctx = NULL};
static esp_err_t handle_reset(httpd_req_t* req)
{
httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
ws_params_t* params = (ws_params_t*)req->user_ctx;
ws_state_t snapshot;
reset_parameters(params);
if (xSemaphoreTake(params->state_lock, portMAX_DELAY) != pdTRUE) {
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "lock failed");
return ESP_FAIL;
}
snapshot = params->state;
xSemaphoreGive(params->state_lock);
ws_state_save(&snapshot);
httpd_resp_send(req, NULL, 0);
return ESP_OK;
}
static httpd_uri_t http_reset_handler = {
.uri = "/reset",
.method = HTTP_POST,
.handler = handle_reset,
.user_ctx = NULL};
httpd_handle_t start_webserver(ws_params_t* params)
{
httpd_handle_t server = NULL;
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.lru_purge_enable = true;
config.max_uri_handlers = NUMBER_PARAMS + 2;
ESP_LOGI(TAG, "Starting httpd server on port: '%d'", config.server_port);
if (httpd_start(&server, &config) == ESP_OK) {
http_params_get_handler.user_ctx = params;
http_reset_handler.user_ctx = params;
httpd_register_uri_handler(server, &http_params_get_handler);
httpd_register_uri_handler(server, &http_reset_handler);
#define STATE_PARAM(typ, attr, ...) \
ESP_LOGI(TAG, "Registering URI handler [%s]", #attr); \
http_##attr##_handler.user_ctx = params; \
httpd_register_uri_handler(server, &http_##attr##_handler);
#include "state_params.i"
#undef STATE_PARAM
return server;
}
ESP_LOGI(TAG, "Error starting server!");
return NULL;
}
|
