我正在嘗試撰寫一段代碼，其中 ESP32 安全地連接到我的 api 服務器并發布一些傳感器資料。為此，我使用 WifiClientSecure 庫。
通過反復試驗，我發現這是client.connect(www.myserver.com, 443); 可行的。
但是client.connect(www.myserver.com/api, 443);會報錯。我已經在互聯網上搜索了解決方案，但無法找到。
完整代碼：
#include <arduino.h>
#include <WiFiClientSecure.h>
const char* ssid = "filled out ssid"; // your network SSID
const char* password = "filled out password"; // your network password
const char* server = "www.server.com/api"; // Server URL
/* use
openssl s_client -showcerts -connect www.howsmyssl.com:443 </dev/null
to get this certificate */
const char* ca_cert = \
"-----BEGIN CERTIFICATE-----\n" \
"MIIF3jCCA8agAwIBAgIQAf1tMPyjylGoG7xkDjUDLTANBgkqhkiG9w0BAQwFADCB\n" \
"iDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCk5ldyBKZXJzZXkxFDASBgNVBAcTC0pl\n" \
"cnNleSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNUIE5ldHdvcmsxLjAsBgNV\n" \
"BAMTJVVTRVJUcnVzdCBSU0EgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMTAw\n" \
"MjAxMDAwMDAwWhcNMzgwMTE4MjM1OTU5WjCBiDELMAkGA1UEBhMCVVMxEzARBgNV\n" \
"BAgTCk5ldyBKZXJzZXkxFDASBgNVBAcTC0plcnNleSBDaXR5MR4wHAYDVQQKExVU\n" \
"aGUgVVNFUlRSVVNUIE5ldHdvcmsxLjAsBgNVBAMTJVVTRVJUcnVzdCBSU0EgQ2Vy\n" \
"dGlmaWNhdGlvbiBBdXRob3JpdHkwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIK\n" \
"AoICAQCAEmUXNg7D2wiz0KxXDXbtzSfTTK1Qg2HiqiBNCS1kCdzOiZ/MPans9s/B\n" \
"3PHTsdZ7NygRK0faOca8Ohm0X6a9fZ2jY0K2dvKpOyuR OJv0OwWIJAJPuLodMkY\n" \
"tJHUYmTbf6MG8YgYapAiPLz E/CHFHv25B O1ORRxhFnRghRy4YUVD 8M/5 bJz/\n" \
"Fp0YvVGONaanZshyZ9shZrHUm3gDwFA66Mzw3LyeTP6vBZY1H1dat//O T23LLb2\n" \
"VN3I5xI6Ta5MirdcmrS3ID3KfyI0rn47aGYBROcBTkZTmzNg95S UzeQc0PzMsNT\n" \
"79uq/nROacdrjGCT3sTHDN/hMq7MkztReJVni 49Vv4M0GkPGw/zJSZrM233bkf6\n" \
"c0Plfg6lZrEpfDKEY1WJxA3Bk1QwGROs0303p tdOmw1XNtB1xLaqUkL39iAigmT\n" \
"Yo61Zs8liM2EuLE/pDkP2QKe6xJMlXzzawWpXhaDzLhn4ugTncxbgtNMs 1b/97l\n" \
"c6wjOy0AvzVVdAlJ2ElYGn SNuZRkg7zJn0cTRe8yexDJtC/QV9AqURE9JnnV4ee\n" \
"UB9XVKg /XRjL7FQZQnmWEIuQxpMtPAlR1n6BB6T1CZGSlCBst6 eLf8ZxXhyVeE\n" \
"Hg9j1uliutZfVS7qXMYoCAQlObgOK6nyTJccBz8NUvXt7y CDwIDAQABo0IwQDAd\n" \
"BgNVHQ4EFgQUU3m/WqorSs9UgOHYm8Cd8rIDZsswDgYDVR0PAQH/BAQDAgEGMA8G\n" \
"A1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQEMBQADggIBAFzUfA3P9wF9QZllDHPF\n" \
"Up/L M ZBn8b2kMVn54CVVeWFPFSPCeHlCjtHzoBN6J2/FNQwISbxmtOuowhT6KO\n" \
"VWKR82kV2LyI48SqC/3vqOlLVSoGIG1VeCkZ7l8wXEskEVX/JJpuXior7gtNn3/3\n" \
"ATiUFJVDBwn7YKnuHKsSjKCaXqeYalltiz8I 8jRRa8YFWSQEg9zKC7F4iRO/Fjs\n" \
"8PRF/iKz6y O0tlFYQXBl2 odnKPi4w2r78NBc5xjeambx9spnFixdjQg3IM8WcR\n" \
"iQycE0xyNN 81XHfqnHd4blsjDwSXWXavVcStkNr/ XeTWYRUc ZruwXtuhxkYze\n" \
"Sf7dNXGiFSeUHM9h4ya7b6NnJSFd5t0dCy5oGzuCr yDZ4XUmFF0sbmZgIn/f3gZ\n" \
"XHlKYC6SQK5MNyosycdiyA5d9zZbyuAlJQG03RoHnHcAP9Dc1ew91Pq7P8yF1m9/\n" \
"qS3fuQL39ZeatTXaw2ewh0qpKJ4jjv9cJ2vhsE/zB 4ALtRZh8tSQZXq9EfX7mRB\n" \
"VXyNWQKV3WKdwrnuWih0hKWbt5DHDAff9Yk2dDLWKMGwsAvgnEzDHNb842m1R0aB\n" \
"L6KCq9NjRHDEjf8tM7qtj3u1cIiuPhnPQCjY/MiQu12ZIvVS5ljFH4gxQ 6IHdfG\n" \
"jjxDah2nGN59PRbxYvnKkKj9\n" \
"-----END CERTIFICATE-----\n" ;
/* create an instance of WiFiClientSecure */
WiFiClientSecure client;
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
/* waiting for WiFi connect */
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(100);
}
Serial.print("Connected to ");
Serial.println(ssid);
/* set SSL/TLS certificate */
client.setCACert(ca_cert);
Serial.println("Connect to server via port 443");
if (!client.connect(server, 443)){
Serial.println("Connection failed!");
} else {
Serial.println("Connected to server!");
/* create HTTP request */
Serial.print("Waiting for response ");
while (!client.available()){
delay(50); //
Serial.print(".");
}
/* if data is available then receive and print to Terminal */
while (client.available()) {
char c = client.read();
Serial.write(c);
}
/* if the server disconnected, stop the client */
if (!client.connected()) {
Serial.println();
Serial.println("Server disconnected");
client.stop();
}
}
}
void loop() {
}
uj5u.com熱心網友回復：
www.server.com/api是部分 URL。完整的 URL 將為https://www.server.com/api，其中：
https- 這部分稱為方案或協議。HTTPS 表示默認 TCP 埠 443（http 表示默認埠 80）www.server.com- 域部分，也可以稱為服務器地址。api- 這是服務器上的路徑
WiFiClient, 或者WiFiClientSecure, 是 TCP 客戶端，它對 URL 一無所知。TCP 客戶端僅識別地址，以 IP 地址 (192.168.1.20) 或 FQDN（然后轉換為 IP 地址）的形式給出。
使用HTTPClient請求 HTTP 資源更容易。
編輯：FNDQ->FQDN
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/382246.html