Ilya I
Example of HTTPServer with additional features: * SNTPClient, DST rules * Link status indication * Local or SDCard-based WebServer * RPC-able class * Static and Dynamic HTML page
HTTPDynamicPage.h@2:360fda42fefd, 2010-01-12 (annotated)
- Committer:
- iva2k
- Date:
- Tue Jan 12 07:41:55 2010 +0000
- Revision:
- 2:360fda42fefd
- Parent:
- 0:886e4b3119ad
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| iva2k | 0:886e4b3119ad | 1 | #ifndef HTTPDYNAMICPAGE_H |
| iva2k | 0:886e4b3119ad | 2 | #define HTTPDYNAMICPAGE_H |
| iva2k | 0:886e4b3119ad | 3 | |
| iva2k | 0:886e4b3119ad | 4 | #include "HTTPServer.h" |
| iva2k | 0:886e4b3119ad | 5 | |
| iva2k | 0:886e4b3119ad | 6 | /** |
| iva2k | 0:886e4b3119ad | 7 | * A datastorage helper for the HTTPDynamicPage class. |
| iva2k | 0:886e4b3119ad | 8 | * Stores dynamically created page data and the size left to upload. |
| iva2k | 0:886e4b3119ad | 9 | */ |
| iva2k | 0:886e4b3119ad | 10 | class HTTPDynamicPageData : public HTTPData { |
| iva2k | 0:886e4b3119ad | 11 | public: |
| iva2k | 0:886e4b3119ad | 12 | HTTPDynamicPageData() |
| iva2k | 0:886e4b3119ad | 13 | : page_free(NULL), page(NULL), size(0), _left(0) {} |
| iva2k | 0:886e4b3119ad | 14 | virtual ~HTTPDynamicPageData() { |
| iva2k | 0:886e4b3119ad | 15 | if (page_free && page) { |
| iva2k | 0:886e4b3119ad | 16 | page_free(page); |
| iva2k | 0:886e4b3119ad | 17 | } |
| iva2k | 0:886e4b3119ad | 18 | } |
| iva2k | 0:886e4b3119ad | 19 | |
| iva2k | 0:886e4b3119ad | 20 | /** Pointer to garbage collection function (for freeing page data) |
| iva2k | 0:886e4b3119ad | 21 | * Should be set by callback function to a suitable free() if page is dynamically allocated |
| iva2k | 0:886e4b3119ad | 22 | */ |
| iva2k | 0:886e4b3119ad | 23 | void (*page_free)(void *page); |
| iva2k | 0:886e4b3119ad | 24 | |
| iva2k | 0:886e4b3119ad | 25 | /** Pointer to the page data */ |
| iva2k | 0:886e4b3119ad | 26 | char *page; |
| iva2k | 0:886e4b3119ad | 27 | |
| iva2k | 0:886e4b3119ad | 28 | /** Page data size |
| iva2k | 0:886e4b3119ad | 29 | * As long as the page is NULL terminated you don't have to tell the data length. |
| iva2k | 0:886e4b3119ad | 30 | * But if you want to send binary data you should tell us the size. |
| iva2k | 0:886e4b3119ad | 31 | */ |
| iva2k | 0:886e4b3119ad | 32 | int size; |
| iva2k | 0:886e4b3119ad | 33 | |
| iva2k | 0:886e4b3119ad | 34 | /** Page data size left for the upload */ |
| iva2k | 0:886e4b3119ad | 35 | int _left; |
| iva2k | 0:886e4b3119ad | 36 | }; |
| iva2k | 0:886e4b3119ad | 37 | |
| iva2k | 0:886e4b3119ad | 38 | /** |
| iva2k | 0:886e4b3119ad | 39 | * This class Provide a Handler to send Static HTTP Pages from the bin file. |
| iva2k | 0:886e4b3119ad | 40 | */ |
| iva2k | 0:886e4b3119ad | 41 | class HTTPDynamicPage : public HTTPHandler { |
| iva2k | 0:886e4b3119ad | 42 | public: |
| iva2k | 0:886e4b3119ad | 43 | /** |
| iva2k | 0:886e4b3119ad | 44 | * Constructor takes the page path and the page callback function. |
| iva2k | 0:886e4b3119ad | 45 | */ |
| iva2k | 0:886e4b3119ad | 46 | HTTPDynamicPage(const char *path, HTTPStatus page_fnc(HTTPConnection *con, HTTPDynamicPageData *pd)) |
| iva2k | 0:886e4b3119ad | 47 | : HTTPHandler(path), _page_fnc(page_fnc) { |
| iva2k | 0:886e4b3119ad | 48 | } |
| iva2k | 0:886e4b3119ad | 49 | |
| iva2k | 0:886e4b3119ad | 50 | HTTPDynamicPage(HTTPServer *server, const char *path, HTTPStatus page_fnc(HTTPConnection *con, HTTPDynamicPageData *pd)) |
| iva2k | 0:886e4b3119ad | 51 | : HTTPHandler(path), _page_fnc(page_fnc) { |
| iva2k | 0:886e4b3119ad | 52 | server->addHandler(this); |
| iva2k | 0:886e4b3119ad | 53 | } |
| iva2k | 0:886e4b3119ad | 54 | |
| iva2k | 0:886e4b3119ad | 55 | private: |
| iva2k | 0:886e4b3119ad | 56 | /** |
| iva2k | 0:886e4b3119ad | 57 | * This Dynamic Page is requested! |
| iva2k | 0:886e4b3119ad | 58 | * Prepare a datastorage helper "HTTPDynamicPageData", create the page and store in helper, then initialize remaining data size. |
| iva2k | 0:886e4b3119ad | 59 | * And return HTTP_OK if all ok. |
| iva2k | 0:886e4b3119ad | 60 | */ |
| iva2k | 0:886e4b3119ad | 61 | virtual HTTPStatus init(HTTPConnection *con) const { |
| iva2k | 0:886e4b3119ad | 62 | HTTPDynamicPageData *data = new HTTPDynamicPageData(); |
| iva2k | 0:886e4b3119ad | 63 | con->data = data; |
| iva2k | 0:886e4b3119ad | 64 | HTTPStatus status = _page_fnc(con, data); // assigns data->page, data->size and optionally data->page_free |
| iva2k | 0:886e4b3119ad | 65 | if (!data->size && data->page) |
| iva2k | 0:886e4b3119ad | 66 | data->size = strlen(data->page); |
| iva2k | 0:886e4b3119ad | 67 | data->_left = data->size; |
| iva2k | 0:886e4b3119ad | 68 | con->setLength(data->size); |
| iva2k | 0:886e4b3119ad | 69 | return status; |
| iva2k | 0:886e4b3119ad | 70 | } |
| iva2k | 0:886e4b3119ad | 71 | |
| iva2k | 0:886e4b3119ad | 72 | /** |
| iva2k | 0:886e4b3119ad | 73 | * Send the maximum data out to the client. |
| iva2k | 0:886e4b3119ad | 74 | * If the file is complete transmitted close connection by returning HTTP_SuccessEnded |
| iva2k | 0:886e4b3119ad | 75 | */ |
| iva2k | 0:886e4b3119ad | 76 | virtual HTTPHandle send(HTTPConnection *con, int maximum) const { |
| iva2k | 0:886e4b3119ad | 77 | HTTPDynamicPageData *data = static_cast<HTTPDynamicPageData *>(con->data); |
| iva2k | 0:886e4b3119ad | 78 | int len = min(maximum, data->_left); |
| iva2k | 0:886e4b3119ad | 79 | err_t err; |
| iva2k | 0:886e4b3119ad | 80 | |
| iva2k | 0:886e4b3119ad | 81 | do { |
| iva2k | 0:886e4b3119ad | 82 | err = con->write((void*)&data->page[data->size - data->_left], len, 1); |
| iva2k | 0:886e4b3119ad | 83 | if (err == ERR_MEM) { |
| iva2k | 0:886e4b3119ad | 84 | len >>= 1; |
| iva2k | 0:886e4b3119ad | 85 | } |
| iva2k | 0:886e4b3119ad | 86 | } while(err == ERR_MEM && len > 1); |
| iva2k | 0:886e4b3119ad | 87 | if (err == ERR_OK) { |
| iva2k | 0:886e4b3119ad | 88 | data->_left -= len; |
| iva2k | 0:886e4b3119ad | 89 | } |
| iva2k | 0:886e4b3119ad | 90 | return (data->_left) ? HTTP_Success : HTTP_SuccessEnded; |
| iva2k | 0:886e4b3119ad | 91 | } |
| iva2k | 0:886e4b3119ad | 92 | |
| iva2k | 0:886e4b3119ad | 93 | HTTPStatus (*_page_fnc)(HTTPConnection *con, HTTPDynamicPageData *pd); |
| iva2k | 0:886e4b3119ad | 94 | }; |
| iva2k | 0:886e4b3119ad | 95 | |
| iva2k | 0:886e4b3119ad | 96 | #endif |