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HTTPParser framework

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Beware needs uplifted wifi buffer
This commit is contained in:
Asbelos 2020-06-28 12:45:31 +01:00
parent c97d07608b
commit 68f47dae17
6 changed files with 42 additions and 11 deletions
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11
HTTPParser.cpp Normal file
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@ -0,0 +1,11 @@
#include "HTTPParser.h"
#include "StringFormatter.h"
void HTTPParser::parse(Print & stream, char * cmd) {
// BEWARE - As soon as you start responding, the cmd buffer is trashed!
// You must get everything you need from it before using StringFormatter::send!
StringFormatter::send(stream,F("HTTP/1.1 200 OK\nContent-Type: text/html\nConnnection: close\n\n"));
StringFormatter::send(stream,F("<html><body>This is <b>not</b> a web server.<br/></body></html>"));
}

8
HTTPParser.h Normal file
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@ -0,0 +1,8 @@
#ifndef HTTPParser_h
#define HTTPParser_h
#include <Arduino.h>
class HTTPParser {
public:
static void parse(Print & stream, char * cmd);
};
#endif

6
StringFormatter.cpp
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@ -5,16 +5,16 @@
void StringFormatter::print( const __FlashStringHelper* input...) {
va_list args;
va_start(args, input);
send(Serial,input,args);
send2(Serial,input,args);
}
void StringFormatter::send(Print & stream, const __FlashStringHelper* input...) {
va_list args;
va_start(args, input);
send(stream,input,args);
send2(stream,input,args);
}
void StringFormatter::send(Print & stream,const __FlashStringHelper* format, va_list args) {
void StringFormatter::send2(Print & stream,const __FlashStringHelper* format, va_list args) {
// thanks to Jan Turoň https://arduino.stackexchange.com/questions/56517/formatting-strings-in-arduino-for-output

2
StringFormatter.h
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@ -8,7 +8,7 @@ class StringFormatter
static void print( const __FlashStringHelper* input...);
static void send(Print & serial, const __FlashStringHelper* input...);
private:
static void send(Print & serial, const __FlashStringHelper* input,va_list args);
static void send2(Print & serial, const __FlashStringHelper* input,va_list args);
};

24
WifiInterface.cpp
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@ -3,11 +3,12 @@
#include "DIAG.h"
#include "StringFormatter.h"
#include "WiThrottle.h"
#include "HTTPParser.h"
const char PROGMEM READY_SEARCH[] ="\r\nready\r\n";
const char PROGMEM OK_SEARCH[] ="\r\nOK\r\n";
const char PROGMEM END_DETAIL_SEARCH[] ="@ 1000";
const char PROGMEM PROMPT_SEARCH[] =">";
const char PROGMEM SEND_OK_SEARCH[] ="\r\nSEND OK\r\n";
bool WifiInterface::connected=false;
DCCEXParser WifiInterface::parser;
@ -126,17 +127,28 @@ void WifiInterface::loop(Stream & wifiStream) {
// Otherwise we would have to copy the buffer elsewhere and RAM is in short supply.
// TODO ... tell JMRI parser that callbacks are diallowed because we dont want to handle the async
if (buffer[0]=='<') parser.parse(streamer,buffer);
bool closeAfter=false;
// Intercept HTTP requests
if (strstr(buffer," HTTP/1.1")) {
HTTPParser::parse(streamer,buffer);
closeAfter=true;
}
else if (buffer[0]=='<') parser.parse(streamer,buffer);
else WiThrottle::getThrottle(streamer, connectionId)->parse(streamer, buffer);
if (streamer.available()) { // there is a reply to send
DIAG(F("WiFiInterface Responding (%d) %s\n"),connectionId,buffer);
StringFormatter::send(wifiStream,F("AT+CIPSEND=%d,%d\r\n"),connectionId,streamer.available());
streamer.write('\0');
DIAG(F("WiFiInterface Responding client (%d) l(%d) %s\n"),connectionId,streamer.available()-1,buffer);
StringFormatter::send(wifiStream,F("AT+CIPSEND=%d,%d\r\n"),connectionId,streamer.available()-1);
if (checkForOK(wifiStream,1000,PROMPT_SEARCH,true)) wifiStream.print((char *) buffer);
checkForOK(wifiStream,3000,SEND_OK_SEARCH,true);
}
if (closeAfter) {
StringFormatter::send(wifiStream,F("AT+CIPCLOSE=%d\r\n"),connectionId);
checkForOK(wifiStream,2000,OK_SEARCH,true);
}
loopstate=0; // go back to looking for +IPD
}

2
WifiInterface.h
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@ -21,7 +21,7 @@ class WifiInterface {
static byte loopstate;
static int datalength;
static int connectionId;
static const byte MAX_WIFI_BUFFER=64;
static const byte MAX_WIFI_BUFFER=250;
static byte buffer[MAX_WIFI_BUFFER];
static MemStream streamer;
};