Thomas Kolb
8e9124c884
Now any access to the flash, either through update writing or SPIFFS access, is blocked while the LED stripes are written. This is accomplished using a FreeRTOS semaphore.
335 lines
9.7 KiB
C++
335 lines
9.7 KiB
C++
/* HTTP Server setup and handler functions */
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#include <SPIFFS.h>
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#include <mbedtls/sha256.h>
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#include "WebServer.h"
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#include "Config.h"
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#include "Fader.h"
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#include "Animation/AnimationController.h"
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#include "coreids.h"
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WebServer::WebServer(void)
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: m_cr(Config::instance().getCRPassword()), m_fader(NULL)
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{
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m_server = new httpsserver::HTTPServer();
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}
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bool WebServer::serveFile(String filename, httpsserver::HTTPResponse *res)
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{
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uint8_t buf[1024];
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xSemaphoreTake(*instance().m_ledLockoutMutex, portMAX_DELAY);
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bool exists = SPIFFS.exists(filename);
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xSemaphoreGive(*instance().m_ledLockoutMutex);
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if(!exists) {
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return false;
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}
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xSemaphoreTake(*instance().m_ledLockoutMutex, portMAX_DELAY);
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File f = SPIFFS.open(filename.c_str(), "r");
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xSemaphoreGive(*instance().m_ledLockoutMutex);
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if(!f) {
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return false;
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}
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res->setHeader("Content-Length", httpsserver::intToString(f.size()));
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size_t nread = 1;
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while(nread > 0) {
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xSemaphoreTake(*instance().m_ledLockoutMutex, portMAX_DELAY);
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nread = f.readBytes(reinterpret_cast<char*>(buf), 1024);
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xSemaphoreGive(*instance().m_ledLockoutMutex);
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if(nread <= 0) {
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break;
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}
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res->write(buf, nread);
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}
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xSemaphoreTake(*instance().m_ledLockoutMutex, portMAX_DELAY);
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f.close();
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xSemaphoreGive(*instance().m_ledLockoutMutex);
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return true;
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}
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void WebServer::handleRoot(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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serveFile("/htdocs/index.html", res);
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res->setHeader("Content-Type", "text/html");
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}
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static void error400(httpsserver::HTTPResponse *res, const std::string &reason)
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{
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res->println("Error 400: Bad Request");
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res->println(reason.c_str());
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res->setStatusCode(400);
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}
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void WebServer::handleColor(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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res->setHeader("Content-Type", "text/plain");
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httpsserver::ResourceParameters * params = req->getParams();
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if(!params->isRequestParameterSet("color")) {
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error400(res, "Parameter 'color' not set.");
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return;
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}
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std::string colorstr = params->getRequestParameter("color");
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if(colorstr.length() != 8) {
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error400(res, "Wrong length of color string (expected 8 hex digits).");
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return;
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}
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uint32_t color = 0;
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for(size_t i = 0; i < 8; i++) {
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color <<= 4;
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char c = colorstr[i];
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if(c >= 'A' && c <= 'F') {
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color |= c - 'A' + 10;
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} else if(c >= 'a' && c <= 'f') {
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color |= c - 'a' + 10;
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} else if(c >= '0' && c <= '9') {
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color |= c - '0';
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} else {
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error400(res, "Invalid character in color string (allowed: 0-9, a-f, A-F)");
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return;
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}
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}
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uint8_t r = (color & 0xFF000000) >> 24;
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uint8_t g = (color & 0x00FF0000) >> 16;
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uint8_t b = (color & 0x0000FF00) >> 8;
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uint8_t w = (color & 0x000000FF) >> 0;
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res->print("Color changed to r:");
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res->print(r);
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res->print(" g:");
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res->print(g);
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res->print(" b:");
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res->print(b);
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res->print(" w:");
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res->println(w);
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WebServer::instance().m_fader->fade_color({r,g,b,w});
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}
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void WebServer::handleSetAnim(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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res->setHeader("Content-Type", "text/plain");
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httpsserver::ResourceParameters * params = req->getParams();
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if(!params->isRequestParameterSet("anim")) {
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error400(res, "Parameter 'anim' not set.");
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return;
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}
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std::istringstream animstr(params->getRequestParameter("anim"));
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uint32_t anim_id;
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animstr >> anim_id;
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if(animstr.bad() || animstr.fail()) {
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error400(res, "Parameter 'anim' could not be parsed as number.");
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return;
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}
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if(anim_id >= AnimationController::NUM_DEFAULT_ANIMATIONS) {
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error400(res, "Animation ID out of range.");
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return;
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}
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WebServer::instance().m_animController->changeAnimation(
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static_cast<AnimationController::DefaultAnimation>(anim_id),
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true);
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}
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void WebServer::handleListAnim(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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res->setHeader("Content-Type", "application/json");
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res->print("[");
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for(size_t i = 0; i < AnimationController::AnimationNames.size(); i++) {
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res->print("{\"id\":");
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res->print(i);
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res->print(",\"name\":\"");
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res->print(AnimationController::AnimationNames[i]);
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res->print("\"}");
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if(i < AnimationController::AnimationNames.size()-1) {
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res->print(",");
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}
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}
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res->print("]");
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}
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void WebServer::handleUpdate(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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res->setHeader("Content-Type", "text/plain");
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httpsserver::ResourceParameters * params = req->getParams();
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if(!params->isRequestParameterSet("content")) {
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error400(res, "Send update image as 'content'.");
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}
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res->print("Content length: ");
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res->println(req->getContentLength());
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res->println("Content:");
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res->println("--------------------------------------------------------------------------------");
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uint8_t buf[128];
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while(!req->requestComplete()) {
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size_t bytes_processed = req->readBytes(buf, 128);
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res->write(buf, bytes_processed);
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}
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res->println("--------------------------------------------------------------------------------");
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std::vector<uint8_t> d;
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d.push_back(1);
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d.push_back(2);
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d.push_back(3);
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uint8_t sha256sum[32];
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mbedtls_sha256_ret(d.data(), d.size(), sha256sum, 0);
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for(size_t i = 0; i < 32; i++) {
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static const char *conv = "0123456789abcdef";
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uint8_t b = sha256sum[i];
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res->print(conv[(b >> 4)]);
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res->print(conv[(b &0x0F)]);
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}
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res->println();
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}
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void WebServer::handleChallenge(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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res->setHeader("Content-Type", "application/json");
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std::ostringstream responseBuilder;
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responseBuilder << "{ \"nonce\": " << WebServer::instance().m_cr.nonce() << "}";
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res->println(responseBuilder.str().c_str());
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}
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void WebServer::handleAuthTest(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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res->setHeader("Content-Type", "text/plain");
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httpsserver::ResourceParameters * params = req->getParams();
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if(!params->isRequestParameterSet("response")) {
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error400(res, "Parameter 'response' not set.");
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return;
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}
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std::string response = params->getRequestParameter("response");
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bool result = WebServer::instance().m_cr.verify(response);
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if(result) {
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res->println("Authentication test successful!");
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} else {
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res->println("Authentication test failed (invalid response)");
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}
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}
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void WebServer::handleStatic(httpsserver::HTTPRequest *req, httpsserver::HTTPResponse *res)
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{
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std::string filename = "/htdocs" + req->getRequestString();
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if(*(filename.end()-1) == '/') {
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// looks like a directory name, so append 'index.html'
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filename.append("index.html");
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}
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if(!serveFile(filename.c_str(), res)) {
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req->discardRequestBody();
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res->setStatusCode(404);
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res->setHeader("Content-Type", "text/plain");
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res->println("Error 404: Not found");
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}
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}
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void WebServer::serverTask(void *arg)
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{
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httpsserver::ResourceNode *nodeRoot =
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new httpsserver::ResourceNode("/", "GET", WebServer::handleRoot);
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httpsserver::ResourceNode *nodeAPIColor =
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new httpsserver::ResourceNode("/api/color", "GET", WebServer::handleColor);
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httpsserver::ResourceNode *nodeAPISetAnim =
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new httpsserver::ResourceNode("/api/setanim", "GET", WebServer::handleSetAnim);
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httpsserver::ResourceNode *nodeAPIListAnim =
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new httpsserver::ResourceNode("/api/listanim", "GET", WebServer::handleListAnim);
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httpsserver::ResourceNode *nodeAPIUpdate =
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new httpsserver::ResourceNode("/api/update", "POST", WebServer::handleUpdate);
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httpsserver::ResourceNode *nodeAPIChallenge =
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new httpsserver::ResourceNode("/api/challenge", "GET", WebServer::handleChallenge);
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httpsserver::ResourceNode *nodeAPIAuthTest =
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new httpsserver::ResourceNode("/api/authtest", "GET", WebServer::handleAuthTest);
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// handle all remaining requests by trying to serve static files. If no file is found, 404 is generated.
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httpsserver::ResourceNode *nodeStatic =
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new httpsserver::ResourceNode("", "GET", WebServer::handleStatic);
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WebServer &server = WebServer::instance();
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server.m_server->registerNode(nodeRoot);
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server.m_server->registerNode(nodeAPIColor);
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server.m_server->registerNode(nodeAPISetAnim);
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server.m_server->registerNode(nodeAPIListAnim);
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server.m_server->registerNode(nodeAPIUpdate);
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server.m_server->registerNode(nodeAPIChallenge);
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server.m_server->registerNode(nodeAPIAuthTest);
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server.m_server->setDefaultNode(nodeStatic);
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Serial.println("[server] Starting HTTP Server...");
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server.m_server->start();
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if (server.m_server->isRunning())
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{
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Serial.println("[server] Server ready.");
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while (true)
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{
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server.m_server->loop();
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delay(1);
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}
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}
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Serial.println("[server] Server died?! This should never happen.");
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}
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bool WebServer::start(void)
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{
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xTaskCreatePinnedToCore(
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WebServer::serverTask, /* Task function. */
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"HTTP Server Task", /* name of task. */
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6144, /* Stack size of task */
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NULL, /* parameter of the task */
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1, /* priority of the task */
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NULL, /* Task handle to keep track of created task */
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CORE_ID_WEBSERVER);
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return true;
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}
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