Diff: lwip/HTTPServer/HTTPStaticPage.h

Revision:

0:e1a0471e5ffb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lwip/HTTPServer/HTTPStaticPage.h	Wed Dec 15 15:01:56 2010 +0000
@@ -0,0 +1,78 @@
+#ifndef HTTPSTATICPAGE_H
+#define HTTPSTATICPAGE_H
+
+#include "HTTPServer.h"
+
+/**
+ * A datastorage helper for the HTTPStaticPage class.
+ * Stores only the left upload size.
+ */
+class HTTPStaticPageData : public HTTPData {
+  public: int left;
+};
+
+/**
+ * This class Provide a Handler to send Static HTTP Pages from the bin file.
+ */
+class HTTPStaticPage : public HTTPHandler {
+  public:
+    /**
+     * Constructer takes the pagename and the pagedata.
+     * As long as the pagedata is NULL terminated you have not to tell the data length.
+     * But if you want to send binary data you should tell us the size.
+     */
+    HTTPStaticPage(const char *path, const char *page, int length = 0)
+     : HTTPHandler(path), _page(page) {
+      _size = (length)?length:strlen(_page);
+    }
+
+    HTTPStaticPage(HTTPServer *server, const char *path, const char *page, int length = 0)
+     : HTTPHandler(path), _page(page) {
+      _size = (length)?length:strlen(_page);
+      server->addHandler(this);
+    }
+
+  private:
+    /**
+     * A this Static Page is requested!
+     * Prepare a datastorage helper "HTTPStaticPageHelper" to store the left data size.
+     * And return HTTP_OK
+     */
+    virtual HTTPStatus init(HTTPConnection *con) const {
+      HTTPStaticPageData *data = new HTTPStaticPageData();
+      con->data = data;
+      data->left = _size;
+      con->setLength(_size);
+      return HTTP_OK;
+    }
+
+    /**
+     * Send the maximum data out to the client. 
+     * If the file is complete transmitted close connection by returning HTTP_SuccessEnded
+     */
+    virtual HTTPHandle send(HTTPConnection *con, int maximum) const {
+      HTTPStaticPageData *data = static_cast<HTTPStaticPageData *>(con->data);
+      int len = min(maximum, data->left);
+      err_t err;
+
+      do {
+        err = con->write((void*)&_page[_size - data->left], len, 1);
+        if(err == ERR_MEM) {
+          len >>= 1;
+        }
+      } while(err == ERR_MEM && len > 1);
+      if(err == ERR_OK) {
+        data->left -= len;
+      }
+
+      return (data->left)? HTTP_Success : HTTP_SuccessEnded;
+    }
+
+    /** Pointer to the page data */
+    const char *_page;
+    
+    /** page data size*/
+    int   _size;
+};
+
+#endif