adrianca88
commented
2 years ago Example on ESP32 and SIM808:
/**
* Download file using http Connection
* WARNING: buffer must be pre-allocated
*/
uint32_t DownloadFile(const char* file, uint8_t* buffer, uint32_t size)
{
if (!file || !buffer || size <= 0) {
return 0;
}
// Connect to network
if (!mSIM->isGprsConnected()) {
connectGSM();
}
// Connect to server
Serial.print(F("Connecting to server..."));
if (!mSIM_Client->connect(mServer, HTTP_PORT, HTTP_TIMEOUT_SEC)) {
Serial.println(F(" FAIL"));
return 0;
}
Serial.println(F(" OK!"));
mSIM_Client->print(String("GET ") + file + " HTTP/1.0\r\n");
mSIM_Client->print(String("Host: ") + mServer + ":" + HTTP_PORT + "\r\n");
mSIM_Client->print("Connection: close\r\n\r\n");
// Parse header
Serial.println(F("Waiting for response header"));
uint32_t clientReadStartTime = millis();
String headerBuffer;
bool finishedHeader = false;
uint32_t contentLength = 0;
while (!finishedHeader) {
int nlPos;
if (mSIM_Client->available()) {
clientReadStartTime = millis();
while (mSIM_Client->available()) {
char c = mSIM_Client->read();
headerBuffer += c;
/*// Uncomment the lines below to see the data coming into the buffer
if (isprint(c))
Serial.print(reinterpret_cast<char> (c));
else
Serial.print('*');*/
if (headerBuffer.indexOf(F("\r\n")) >= 0) {
break;
}
}
} else if (millis() - clientReadStartTime > DOWNLOAD_FILE_TIMEOUT) {
Serial.println(F(">>> Client Timeout !"));
break;
}
// See if we have a new line.
nlPos = headerBuffer.indexOf(F("\r\n"));
if (nlPos > 0) {
headerBuffer.toLowerCase();
// Check if line contains content-length
if (headerBuffer.startsWith(F("content-length:"))) {
contentLength = headerBuffer.substring(headerBuffer.indexOf(':') + 1).toInt();
}
headerBuffer.remove(0, nlPos + 2); // remove the line
} else if (nlPos == 0) {
// if the new line is empty (i.e. "\r\n" is at the beginning of the line), we are done with the header.
finishedHeader = true;
}
}
if (contentLength != size || !finishedHeader) {
Serial.println(F("Error parsing header content-length size or different sizes\n"));
mSIM_Client->stop();
return 0;
}
// Read content
Serial.println(F("Reading response data"));
uint32_t readLength = 0;
clientReadStartTime = millis();
while (readLength < contentLength && mSIM_Client->connected() && millis() - clientReadStartTime < DOWNLOAD_FILE_TIMEOUT) {
while (mSIM_Client->available()) {
buffer[readLength++] = mSIM_Client->read();
clientReadStartTime = millis();
}
}
mSIM_Client->stop();
return readLength;
}
shivaniumredkar1102
SRGDamia1
[ x] I have read the Troubleshooting section of the ReadMe
What type of issues is this?
[ ] Request to support a new module
[ ] Bug or problem compiling the library [ x] Bug or issue with library functionality (ie, sending data over TCP/IP) [ ] Question or request for help
What are you working with?
Modem: u-blox Model: SARA-R412M-02B Revision: M0.10.00 [Mar 28 2019 17:13:41] SVN: 05 IMEI: 354679093770504 Main processor board: SODAQ SARA R412 TinyGSM version: 0.11.3 Code:
Scenario, steps to reproduce
I want to download the file
UPDATE.BIN. But the response is only printing"*"s.Replace
server_otawith116.202.190.107andhostnamewithtracking.webaro.de. You do get a response this time.However, the response is :
H T T P / 1 . 1 2 0 0 O K 0 * 0 * S e r v e r : n g i n x / 1 . 1 8 . 0 ( U b u n t u ) 0 * 0 * D a t e : S u n , 2 5 J u l 2 0 2 1 2 0 : 2 5 : 2 2 G M T 0 * 0 * C o n t e n t - T y p e : t e x t / h t m l ; c h a r s e t = U T F - 8 0 * 0 * C o n t e n t - L e n g t h : 2 2 9 0 * 0 * C o n n e c t i o n : c l o s e 0 * 0 * c a c h e - c o n t r o l : m a x - a g e = 3 6 0 0 0 * 0 * l a s t - m o d i f i e d : M o n , 2 6 A p r 2 0 2 1 0 9 : 3 9 : 1 8 G M T 0 * 0 * e t a g : W / " 1 2 0 5 9 4 4 - 2 2 9 - 2 0 2 1 - 0 4 - 2 6 T 0 9 : 3 9 : 1 8 . 0 0 0 Z " 0 * 0 * 0 * 0 *Then it downloads an HTML FILE :
<html><header> <title>Machine Tracking</title> <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500"> <script src="/src.008db41b.js"></script> </header><body> <div id="app"></div> </body></html><html><header> <title>Machine Tracking</title> <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500"> <script src="/src.008db41b.js"></script> </header><body> <div id="app"></div> </body></html><html><header> <title>Machine Tracking</title> <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500"> <script src="/src.008db41b.js"></script> </header><body> <div id="app"></div> </body></html>The URLs i have given you are the correct URLs. You can check the files there
Expected result
H T T P / 1 . 1 2 0 0 O K 0 * 0 * S e r v e r : n g i n x / 1 . 1 8 . 0 ( U b u n t u ) 0 * 0 * D a t e : S u n , 2 5 J u l 2 0 2 1 2 0 : 2 5 : 2 2 G M T 0 * 0 * C o n t e n t - T y p e : a p p l i c a t i o n / o c t a t e - s t r e a m ; c h a r s e t = U T F - 8 0 * 0 * C o n t e n t - L e n g t h : 1 3 3 9 4 4 0 * 0 * C o n n e c t i o n : c l o s e 0 * 0 * c a c h e - c o n t r o l : m a x - a g e = 3 6 0 0 0 * 0 * l a s t - m o d i f i e d : M o n , 2 6 A p r 2 0 2 1 0 9 : 3 9 : 1 8 G M T 0 * 0 * e t a g : W / " 1 2 0 5 9 4 4 - 2 2 9 - 2 0 2 1 - 0 4 - 2 6 T 0 9 : 3 9 : 1 8 . 0 0 0 Z " 0 * 0 * 0 * 0 *Actual result
Either only
*are printed, or the wrong HTTP response.Debug and AT command log
For the first case, where only '+' are printed :
The modem has been initialized properly. It can send POST requests without problems. The GET is performing strangely.
I undertstand, that this is possibly not a tinyGSM issue. Perhaps the servers are configured wrong. But I hope that you will point me in the right direction. Thank you