Merge pull request #48 from glyptodon/common-json
GUAC-1172: Move JSON functions to common.
This commit is contained in:
commit
637e5e95f7
@ -1,5 +1,5 @@
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#
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# Copyright (C) 2013 Glyptodon LLC
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# Copyright (C) 2015 Glyptodon LLC
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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@ -31,6 +31,7 @@ noinst_HEADERS = \
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guac_clipboard.h \
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guac_dot_cursor.h \
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guac_iconv.h \
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guac_json.h \
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guac_list.h \
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guac_pointer_cursor.h \
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guac_rect.h \
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@ -42,6 +43,7 @@ libguac_common_la_SOURCES = \
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guac_clipboard.c \
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guac_dot_cursor.c \
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guac_iconv.c \
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guac_json.c \
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guac_list.c \
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guac_pointer_cursor.c \
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guac_rect.c \
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183
src/common/guac_json.c
Normal file
183
src/common/guac_json.c
Normal file
@ -0,0 +1,183 @@
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/*
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* Copyright (C) 2015 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
|
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
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* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
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||||
*
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||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
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||||
*
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||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h"
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#include "guac_json.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <guacamole/client.h>
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#include <guacamole/protocol.h>
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#include <guacamole/socket.h>
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#include <guacamole/stream.h>
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void guac_common_json_flush(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state) {
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/* If JSON buffer is non-empty, write contents to blob and reset */
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if (json_state->size > 0) {
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guac_protocol_send_blob(client->socket, stream,
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json_state->buffer, json_state->size);
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/* Reset JSON buffer size */
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json_state->size = 0;
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}
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}
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bool guac_common_json_write(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state, const char* buffer, int length) {
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bool blob_written = false;
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/*
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* Append to and flush the JSON buffer as necessary to write the given
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* data
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*/
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while (length > 0) {
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/* Ensure provided data does not exceed size of buffer */
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int blob_length = length;
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if (blob_length > sizeof(json_state->buffer))
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blob_length = sizeof(json_state->buffer);
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/* Flush if more room is needed */
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if (json_state->size + blob_length > sizeof(json_state->buffer)) {
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guac_common_json_flush(client, stream, json_state);
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blob_written = true;
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}
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/* Append data to JSON buffer */
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memcpy(json_state->buffer + json_state->size,
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buffer, blob_length);
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json_state->size += blob_length;
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/* Advance to next blob of data */
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buffer += blob_length;
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length -= blob_length;
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}
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return blob_written;
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}
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bool guac_common_json_write_string(guac_client* client,
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guac_stream* stream, guac_common_json_state* json_state,
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const char* str) {
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bool blob_written = false;
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/* Write starting quote */
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blob_written |= guac_common_json_write(client, stream,
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json_state, "\"", 1);
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/* Write given string, escaping as necessary */
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const char* current = str;
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for (; *current != '\0'; current++) {
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/* Escape all quotes */
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if (*current == '"') {
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/* Write any string content up to current character */
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if (current != str)
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blob_written |= guac_common_json_write(client, stream,
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json_state, str, current - str);
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/* Escape the quote that was just read */
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blob_written |= guac_common_json_write(client, stream,
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json_state, "\\", 1);
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/* Reset string */
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str = current;
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}
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}
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/* Write any remaining string content */
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if (current != str)
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blob_written |= guac_common_json_write(client, stream,
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json_state, str, current - str);
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/* Write ending quote */
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blob_written |= guac_common_json_write(client, stream,
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json_state, "\"", 1);
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return blob_written;
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}
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bool guac_common_json_write_property(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state, const char* name,
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const char* value) {
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bool blob_written = false;
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/* Write leading comma if not first property */
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if (json_state->properties_written != 0)
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blob_written |= guac_common_json_write(client, stream,
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json_state, ",", 1);
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/* Write property name */
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blob_written |= guac_common_json_write_string(client, stream,
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json_state, name);
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/* Separate name from value with colon */
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blob_written |= guac_common_json_write(client, stream,
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json_state, ":", 1);
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/* Write property value */
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blob_written |= guac_common_json_write_string(client, stream,
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json_state, value);
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json_state->properties_written++;
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return blob_written;
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}
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void guac_common_json_begin_object(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state) {
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/* Init JSON state */
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json_state->size = 0;
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json_state->properties_written = 0;
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/* Write leading brace - no blob can possibly be written by this */
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assert(!guac_common_json_write(client, stream, json_state, "{", 1));
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}
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bool guac_common_json_end_object(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state) {
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/* Write final brace of JSON object */
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return guac_common_json_write(client, stream, json_state, "}", 1);
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}
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201
src/common/guac_json.h
Normal file
201
src/common/guac_json.h
Normal file
@ -0,0 +1,201 @@
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/*
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* Copyright (C) 2015 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
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||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef GUAC_COMMON_JSON_H
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#define GUAC_COMMON_JSON_H
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#include "config.h"
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#include <stdbool.h>
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#include <guacamole/client.h>
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#include <guacamole/stream.h>
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/**
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* The current streaming state of an arbitrary JSON object, consisting of
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* any number of property name/value pairs.
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*/
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typedef struct guac_common_json_state {
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/**
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* Buffer of partial JSON data. The individual blobs which make up the JSON
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* body of the object being sent over the Guacamole protocol will be
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* built here.
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*/
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char buffer[4096];
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/**
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* The number of bytes currently used within the JSON buffer.
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*/
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int size;
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/**
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* The number of property name/value pairs written to the JSON object thus
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* far.
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*/
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int properties_written;
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} guac_common_json_state;
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/**
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* Given a stream, the client to which it belongs, and the current stream state
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* of a JSON object, flushes the contents of the JSON buffer to a blob
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* instruction. Note that this will flush the JSON buffer only, and will not
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* necessarily flush the underlying guac_socket of the client.
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*
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* @param client
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* The client to which the data will be flushed.
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*
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* @param stream
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* The stream through which the flushed data should be sent as a blob.
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*
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* @param json_state
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* The state object whose buffer should be flushed.
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*/
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void guac_common_json_flush(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state);
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/**
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* Given a stream, the client to which it belongs, and the current stream state
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* of a JSON object, writes the contents of the given buffer to the JSON buffer
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* of the stream state, flushing as necessary.
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*
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* @param client
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* The client to which the data will be flushed as necessary.
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*
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* @param stream
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* The stream through which the flushed data should be sent as a blob, if
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* data must be flushed at all.
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*
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* @param json_state
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* The state object containing the JSON buffer to which the given buffer
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* should be written.
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*
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* @param buffer
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* The buffer to write.
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*
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* @param length
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* The number of bytes in the buffer.
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*
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* @return
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* true if at least one blob was written, false otherwise.
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*/
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bool guac_common_json_write(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state, const char* buffer, int length);
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/**
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* Given a stream, the client to which it belongs, and the current stream state
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* of a JSON object state, writes the given string as a proper JSON string,
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* including starting and ending quotes. The contents of the string will be
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* escaped as necessary.
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*
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* @param client
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* The client to which the data will be flushed as necessary.
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*
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* @param stream
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* The stream through which the flushed data should be sent as a blob, if
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* data must be flushed at all.
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*
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* @param json_state
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* The state object containing the JSON buffer to which the given string
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* should be written as a JSON name/value pair.
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*
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* @param str
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* The string to write.
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*
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* @return
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* true if at least one blob was written, false otherwise.
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*/
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bool guac_common_json_write_string(guac_client* client,
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guac_stream* stream, guac_common_json_state* json_state,
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const char* str);
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/**
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* Given a stream, the client to which it belongs, and the current stream state
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* of a JSON object, writes the given JSON property name/value pair. The
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* name and value will be written as proper JSON strings separated by a colon.
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*
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* @param client
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* The client to which the data will be flushed as necessary.
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*
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* @param stream
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* The stream through which the flushed data should be sent as a blob, if
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* data must be flushed at all.
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*
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* @param json_state
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* The state object containing the JSON buffer to which the given strings
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* should be written as a JSON name/value pair.
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*
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* @param name
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* The name of the property to write.
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*
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* @param value
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* The value of the property to write.
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*
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* @return
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* true if at least one blob was written, false otherwise.
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*/
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bool guac_common_json_write_property(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state, const char* name,
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const char* value);
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/**
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* Given a stream, the client to which it belongs, and the current stream state
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* of a JSON object, initializes the state for writing a new JSON object. Note
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* that although the client and stream must be provided, no instruction or
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* blobs will be written due to any call to this function.
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*
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* @param client
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* The client associated with the given stream.
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*
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* @param stream
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* The stream associated with the JSON object being written.
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*
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* @param json_state
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* The state object to initialize.
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*/
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void guac_common_json_begin_object(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state);
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/**
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* Given a stream, the client to which it belongs, and the current stream state
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* of a JSON object, completes writing that JSON object by writing the final
|
||||
* terminating brace. This function must only be called following a
|
||||
* corresponding call to guac_common_json_begin_object().
|
||||
*
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* @param client
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* The client associated with the given stream.
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*
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* @param stream
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* The stream associated with the JSON object being written.
|
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*
|
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* @param json_state
|
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* The state object whose in-progress JSON object should be terminated.
|
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*
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* @return
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* true if at least one blob was written, false otherwise.
|
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*/
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bool guac_common_json_end_object(guac_client* client, guac_stream* stream,
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guac_common_json_state* json_state);
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||||
#endif
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|
@ -22,6 +22,8 @@
|
||||
|
||||
#include "config.h"
|
||||
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||||
#include "guac_json.h"
|
||||
|
||||
#include "client.h"
|
||||
#include "sftp.h"
|
||||
|
||||
@ -340,222 +342,6 @@ guac_object* guac_sftp_expose_filesystem(guac_client* client) {
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a stream, the client to which it belongs, and the current directory
|
||||
* list state, flushes the contents of the JSON buffer to a blob instruction.
|
||||
* Note that this will flush the JSON buffer only, and will not necessarily
|
||||
* flush the underlying guac_socket of the client.
|
||||
*
|
||||
* @param client
|
||||
* The client to which the data will be flushed.
|
||||
*
|
||||
* @param stream
|
||||
* The stream through which the flushed data should be sent as a blob.
|
||||
*
|
||||
* @param list_state
|
||||
* The directory list state.
|
||||
*/
|
||||
static void guac_sftp_ls_flush_json(guac_client* client, guac_stream* stream,
|
||||
guac_sftp_ls_state* list_state) {
|
||||
|
||||
/* If JSON buffer is non-empty, write contents to blob and reset */
|
||||
if (list_state->json_size > 0) {
|
||||
guac_protocol_send_blob(client->socket, stream,
|
||||
list_state->json_buffer, list_state->json_size);
|
||||
|
||||
/* Reset JSON buffer size */
|
||||
list_state->json_size = 0;
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a stream, the client to which it belongs, and the current directory
|
||||
* list state, writes the contents of the given buffer to the JSON buffer of
|
||||
* the directory list state, flushing as necessary.
|
||||
*
|
||||
* @param client
|
||||
* The client to which the data will be flushed as necessary.
|
||||
*
|
||||
* @param stream
|
||||
* The stream through which the flushed data should be sent as a blob, if
|
||||
* data must be flushed at all.
|
||||
*
|
||||
* @param list_state
|
||||
* The directory list state containing the JSON buffer to which the given
|
||||
* buffer should be written.
|
||||
*
|
||||
* @param buffer
|
||||
* The buffer to write.
|
||||
*
|
||||
* @param length
|
||||
* The number of bytes in the buffer.
|
||||
*
|
||||
* @return
|
||||
* true if at least one blob was written, false otherwise.
|
||||
*/
|
||||
static bool guac_sftp_ls_write_json(guac_client* client, guac_stream* stream,
|
||||
guac_sftp_ls_state* list_state, const char* buffer, int length) {
|
||||
|
||||
bool blob_written = false;
|
||||
|
||||
/*
|
||||
* Append to and flush the JSON buffer as necessary to write the given
|
||||
* data
|
||||
*/
|
||||
while (length > 0) {
|
||||
|
||||
/* Ensure provided data does not exceed size of buffer */
|
||||
int blob_length = length;
|
||||
if (blob_length > sizeof(list_state->json_buffer))
|
||||
blob_length = sizeof(list_state->json_buffer);
|
||||
|
||||
/* Flush if more room is needed */
|
||||
if (list_state->json_size + blob_length > sizeof(list_state->json_buffer)) {
|
||||
guac_sftp_ls_flush_json(client, stream, list_state);
|
||||
blob_written = true;
|
||||
}
|
||||
|
||||
/* Append data to JSON buffer */
|
||||
memcpy(list_state->json_buffer + list_state->json_size,
|
||||
buffer, blob_length);
|
||||
|
||||
list_state->json_size += blob_length;
|
||||
|
||||
/* Advance to next blob of data */
|
||||
buffer += blob_length;
|
||||
length -= blob_length;
|
||||
|
||||
}
|
||||
|
||||
return blob_written;
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a stream, the client to which it belongs, and the current directory
|
||||
* list state, writes the given string as a proper JSON string, including
|
||||
* starting and ending quotes. The contents of the string will be escaped as
|
||||
* necessary.
|
||||
*
|
||||
* @param client
|
||||
* The client to which the data will be flushed as necessary.
|
||||
*
|
||||
* @param stream
|
||||
* The stream through which the flushed data should be sent as a blob, if
|
||||
* data must be flushed at all.
|
||||
*
|
||||
* @param list_state
|
||||
* The directory list state containing the JSON buffer to which the given
|
||||
* string should be written as a proper JSON string.
|
||||
*
|
||||
* @param str
|
||||
* The string to write.
|
||||
*
|
||||
* @return
|
||||
* true if at least one blob was written, false otherwise.
|
||||
*/
|
||||
static bool guac_sftp_ls_write_json_string(guac_client* client,
|
||||
guac_stream* stream, guac_sftp_ls_state* list_state,
|
||||
const char* str) {
|
||||
|
||||
bool blob_written = false;
|
||||
|
||||
/* Write starting quote */
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, "\"", 1);
|
||||
|
||||
/* Write given string, escaping as necessary */
|
||||
const char* current = str;
|
||||
for (; *current != '\0'; current++) {
|
||||
|
||||
/* Escape all quotes */
|
||||
if (*current == '"') {
|
||||
|
||||
/* Write any string content up to current character */
|
||||
if (current != str)
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, str, current - str);
|
||||
|
||||
/* Escape the quote that was just read */
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, "\\", 1);
|
||||
|
||||
/* Reset string */
|
||||
str = current;
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Write any remaining string content */
|
||||
if (current != str)
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, str, current - str);
|
||||
|
||||
/* Write ending quote */
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, "\"", 1);
|
||||
|
||||
return blob_written;
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a stream, the client to which it belongs, and the current directory
|
||||
* list state, writes the given directory entry as a JSON name/value pair. The
|
||||
* name and value will be written as proper JSON strings separated by a colon.
|
||||
*
|
||||
* @param client
|
||||
* The client to which the data will be flushed as necessary.
|
||||
*
|
||||
* @param stream
|
||||
* The stream through which the flushed data should be sent as a blob, if
|
||||
* data must be flushed at all.
|
||||
*
|
||||
* @param list_state
|
||||
* The directory list state containing the JSON buffer to which the given
|
||||
* directory should be written as a JSON name/value pair.
|
||||
*
|
||||
* @param mimetype
|
||||
* The mimetype of the directory entry to write.
|
||||
*
|
||||
* @param filename
|
||||
* The filename of the directory entry to write.
|
||||
*
|
||||
* @return
|
||||
* true if at least one blob was written, false otherwise.
|
||||
*/
|
||||
static bool guac_sftp_ls_write_entry(guac_client* client, guac_stream* stream,
|
||||
guac_sftp_ls_state* list_state, const char* mimetype,
|
||||
const char* filename) {
|
||||
|
||||
bool blob_written = false;
|
||||
|
||||
/* Write leading comma if not first entry */
|
||||
if (list_state->entries_written != 0)
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, ",", 1);
|
||||
|
||||
/* Write filename */
|
||||
blob_written |= guac_sftp_ls_write_json_string(client, stream,
|
||||
list_state, filename);
|
||||
|
||||
/* Separate filename from mimetype with colon */
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, ":", 1);
|
||||
|
||||
/* Write mimetype */
|
||||
blob_written |= guac_sftp_ls_write_json_string(client, stream,
|
||||
list_state, mimetype);
|
||||
|
||||
list_state->entries_written++;
|
||||
|
||||
return blob_written;
|
||||
|
||||
}
|
||||
|
||||
int guac_sftp_ls_ack_handler(guac_client* client, guac_stream* stream,
|
||||
char* message, guac_protocol_status status) {
|
||||
|
||||
@ -610,28 +396,18 @@ int guac_sftp_ls_ack_handler(guac_client* client, guac_stream* stream,
|
||||
else
|
||||
mimetype = "application/octet-stream";
|
||||
|
||||
/* Write leading brace if just starting */
|
||||
if (list_state->entries_written == 0)
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, "{", 1);
|
||||
|
||||
/* Write entry */
|
||||
blob_written |= guac_sftp_ls_write_entry(client, stream,
|
||||
list_state, mimetype, absolute_path);
|
||||
blob_written |= guac_common_json_write_property(client, stream,
|
||||
&list_state->json_state, absolute_path, mimetype);
|
||||
|
||||
}
|
||||
|
||||
/* Complete JSON and cleanup at end of directory */
|
||||
if (bytes_read <= 0) {
|
||||
|
||||
/* Ensure leading brace is written */
|
||||
if (list_state->entries_written == 0)
|
||||
blob_written |= guac_sftp_ls_write_json(client, stream,
|
||||
list_state, "{", 1);
|
||||
|
||||
/* Write end of JSON */
|
||||
guac_sftp_ls_write_json(client, stream, list_state, "}", 1);
|
||||
guac_sftp_ls_flush_json(client, stream, list_state);
|
||||
/* Complete JSON object */
|
||||
guac_common_json_end_object(client, stream, &list_state->json_state);
|
||||
guac_common_json_flush(client, stream, &list_state->json_state);
|
||||
|
||||
/* Clean up resources */
|
||||
libssh2_sftp_closedir(list_state->directory);
|
||||
@ -681,14 +457,14 @@ int guac_sftp_get_handler(guac_client* client, guac_object* object,
|
||||
strncpy(list_state->directory_name, name,
|
||||
sizeof(list_state->directory_name));
|
||||
|
||||
list_state->json_size = 0;
|
||||
list_state->entries_written = 0;
|
||||
|
||||
/* Allocate stream for body */
|
||||
guac_stream* stream = guac_client_alloc_stream(client);
|
||||
stream->ack_handler = guac_sftp_ls_ack_handler;
|
||||
stream->data = list_state;
|
||||
|
||||
/* Init JSON object state */
|
||||
guac_common_json_begin_object(client, stream, &list_state->json_state);
|
||||
|
||||
/* Associate new stream with get request */
|
||||
guac_protocol_send_body(client->socket, object, stream,
|
||||
GUAC_CLIENT_STREAM_INDEX_MIMETYPE, name);
|
||||
|
@ -26,6 +26,8 @@
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include "guac_json.h"
|
||||
|
||||
#include <libssh2.h>
|
||||
#include <libssh2_sftp.h>
|
||||
|
||||
@ -56,21 +58,9 @@ typedef struct guac_sftp_ls_state {
|
||||
char directory_name[GUAC_SFTP_MAX_PATH];
|
||||
|
||||
/**
|
||||
* Buffer of partial JSON data. The individual blobs which make up the JSON
|
||||
* body of the directory listing sent over the Guacamole protocol will be
|
||||
* built here.
|
||||
* The current state of the JSON directory object being written.
|
||||
*/
|
||||
char json_buffer[4096];
|
||||
|
||||
/**
|
||||
* The number of bytes currently used within the JSON buffer.
|
||||
*/
|
||||
int json_size;
|
||||
|
||||
/**
|
||||
* The number of entries written to the JSON thus far.
|
||||
*/
|
||||
int entries_written;
|
||||
guac_common_json_state json_state;
|
||||
|
||||
} guac_sftp_ls_state;
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user