Diff: Handler/FsHandler.cpp

Revision:

0:caf5feddac47

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Handler/FsHandler.cpp	Sat Sep 16 02:39:55 2017 +0000
@@ -0,0 +1,126 @@
+/* FsHandler.cpp */
+#include "mbed.h"
+#include "FsHandler.h"
+#define DEBUG
+#include "hl_debug.h"
+
+
+
+static int matchstrings(const char* one, const char* two)
+{
+    int m = 0;
+    
+    for (m = 0; m < min(strlen(one), strlen(two)) ; m++) {
+        if (one[m] != two[m])
+            return m;
+    }
+    return m;
+}
+
+std::map<const char*, const char*> HTTPFsRequestHandler::m_fsMap;
+ 
+HTTPFsRequestHandler::HTTPFsRequestHandler(const char* rootPath, const char* localPath, HTTPConnection::HTTPMessage& Msg, TCPSocketConnection& Tcp)
+    : HTTPRequestHandler(Msg, Tcp)
+{
+    m_rootPath = rootPath;
+    m_localPath = localPath;
+    
+    string myPath = m_rootPath + m_localPath;
+    
+    //  Now replace the virtual root path with a mounted device path
+    std::map<const char*, const char*>::iterator it;
+    const char *bestMatch = NULL;
+    const char *bestMatchExchange = NULL;
+    int match_ind = -1;
+    for (it = m_fsMap.begin() ; it != m_fsMap.end() ; it++) {
+        //  find best match (if the given logical path is containted in the root
+        int s = matchstrings(myPath.c_str(), it->second);
+        INFO("Matching Root %s with handler %s results in %d identical characters\n", myPath.c_str(), it->second, s);
+        if ((s == strlen(it->second)) && (s > match_ind)) {
+            match_ind = s;
+            bestMatch = it->first;
+            bestMatchExchange = it->second;
+        }
+    }
+
+    if (bestMatch != NULL) {
+        m_rootPath = bestMatch;
+        m_localPath = string(myPath).substr(strlen(bestMatchExchange));
+    }
+            
+    handleRequest();
+}
+
+HTTPFsRequestHandler::~HTTPFsRequestHandler()
+{
+}
+
+int HTTPFsRequestHandler::handleGetRequest()
+{
+    HTTPHeaders headers;
+    
+    if (m_localPath.length() > 4) 
+        getStandardHeaders(headers, m_localPath.substr(m_localPath.length()-4).c_str());
+    else
+        getStandardHeaders(headers);
+    
+    INFO("Handling Get Request (root = %s, local = %s).", m_rootPath.c_str(), m_localPath.c_str());
+    int retval = 0;   //success
+    std::string reqPath;
+
+    //  Check if we received a directory with the local bath
+    if ((m_localPath.length() == 0) || (m_localPath.substr( m_localPath.length()-1, 1) == "/")) {
+        //  yes, we shall append the default page name
+        m_localPath += "index.html";
+    }
+    
+    reqPath = m_rootPath + m_localPath;
+    
+    INFO("Mapping \"%s\" to \"%s\"", msg.uri.c_str(), reqPath.c_str());
+        
+    FILE *fp = fopen(reqPath.c_str(), "r");
+    if (fp != NULL) {
+        char * pBuffer = NULL;
+        int sz = 8192;
+        while( pBuffer == NULL) {
+            sz /= 2;
+            pBuffer = (char*)malloc(sz);
+            if (sz < 128)
+                error ("OutOfMemory");
+        }
+        
+        //  File was found and can be returned
+    
+        //  first determine the size
+        fseek(fp, 0, SEEK_END);
+        long size = ftell(fp);
+        fseek(fp, 0, SEEK_SET);
+    
+        startResponse(200, size);
+        while(!feof(fp) && !ferror(fp)) {
+            int cnt = fread(pBuffer, 1, sz , fp);
+            if (cnt < 0)
+                cnt = 0;
+            processResponse(cnt, pBuffer);
+        }
+        delete pBuffer;
+        endResponse();
+        fclose(fp);
+    }
+    else {
+        retval = 404;
+        ERR("Requested file was not found !");
+    }
+    
+    return retval;
+}
+
+int HTTPFsRequestHandler::handlePostRequest()
+{
+    return 404;
+}
+
+int HTTPFsRequestHandler::handlePutRequest()
+{
+    return 404;
+}