File size: 6,404 Bytes
c7436b1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | #ifndef ATTACHMENT_WRITER
#define ATTACHMENT_WRITER
#include <string.h>
#include <stdlib.h>
#include "indexed_list.h"
#include "pattern.h"
#include "filemanager.h"
extern "C" {
#include "multipart.h"
}
class TempfileWriter;
typedef void (*WriterCallback_t)(TempfileWriter *, const void *context1, void *context2);
class TempfileWriter
{
IndexedList<const char *> filenames;
IndexedList<size_t> filesizes;
IndexedList<uint8_t *>filebuffers;
File *fo;
size_t file_size;
HTTPReqMessage *req;
HTTPRespMessage *resp;
WriterCallback_t callback;
const void *context1;
void *context2;
public:
TempfileWriter(HTTPReqMessage *req, HTTPRespMessage *resp, WriterCallback_t cb, const void *c1, void *c2)
: filenames(4, NULL), filesizes(4, 0), filebuffers(4, NULL) {
fo = NULL;
this->req = req;
this->resp = resp;
callback = cb;
context1 = c1;
context2 = c2;
}
~TempfileWriter()
{
// filenames were created with strdup, so we need to free them here
for (int i=0; i<filenames.get_elements(); i++) {
free((char *)filenames[i]);
}
for (int i=0; i<filebuffers.get_elements(); i++) {
free(filebuffers[i]);
}
}
HTTPReqMessage *get_request()
{
return req;
}
HTTPRespMessage *get_response()
{
return resp;
}
static void collect_wrapper(BodyDataBlock_t *block)
{
TempfileWriter *writer = (TempfileWriter *)block->context;
writer->collect(block);
}
void collect(BodyDataBlock_t *block)
{
char filename[128];
char tempstring[128];
uint32_t dummy;
HTTPHeaderField *f;
switch(block->type) {
case eStart:
fo = NULL;
break;
case eDataStart:
{
mstring canonical_path;
FRESULT fres = FileManager::getFileManager()->create_temp_file("upload", NULL,
FA_WRITE | FA_CREATE_ALWAYS, &fo, &canonical_path);
if (fres == FR_OK) {
filenames.append(strdup(canonical_path.c_str()));
} else {
filenames.append(strdup(""));
fo = NULL;
}
}
file_size = 0;
break;
case eSubHeader:
filename[0] = 0;
f = (HTTPHeaderField *)block->data;
for(int i=0; i < block->length; i++) {
if (strcasecmp(f[i].key, "Content-Disposition") == 0) {
// extract filename from value string, e.g. 'form-data; name="bestand"; filename="sample.html"'
strncpy(tempstring, f[i].value, 127); tempstring[127] = 0;
char *sub = strstr(tempstring, "filename=\"");
if (sub) {
sub += 10; // remove the 'filename="' part
char *quote = strstr(sub, "\"");
if (quote) {
*quote = 0;
}
while((*sub == '.') || (*sub == '\\') || (*sub == '/')) {
sub++;
}
fix_filename(sub);
strncpy(filename, sub, sizeof(filename) - 1);
filename[127] = 0;
}
}
}
{
mstring canonical_path;
FRESULT fres = FileManager::getFileManager()->create_temp_file("upload",
filename[0] ? filename : NULL, FA_WRITE | FA_CREATE_ALWAYS, &fo, &canonical_path);
if (fres == FR_OK) {
filenames.append(strdup(canonical_path.c_str()));
} else {
filenames.append(strdup(""));
fo = NULL;
}
}
file_size = 0;
break;
case eDataBlock:
if (fo) {
fo->write(block->data, block->length, &dummy);
file_size += block->length;
}
break;
case eDataEnd:
filesizes.append(fo ? file_size : 0);
if (fo) {
FileManager::getFileManager()->fclose(fo);
fo = NULL;
}
break;
case eTerminate:
if (fo) {
FileManager::getFileManager()->fclose(fo);
fo = NULL;
}
printf("Uploaded files:\n");
for (int i=0;i<filenames.get_elements();i++) {
printf(" '%s' (%d)\n", filenames[i], (int)filesizes[i]);
}
// The actual function should now be called to do something with these files
// but since we don't know the context in which this writer is used,
// we simply call the callback with the context.
if (callback) {
callback(this, context1, context2);
}
break;
}
}
const char *get_filename(int index)
{
const char *filename = filenames[index];
return filename ? filename : "";
}
size_t get_filesize(int index)
{
return filesizes[index];
}
uint8_t *get_buffer(int index)
{
return filebuffers[index];
}
int buffer_file(int index, size_t max_size)
{
size_t size = filesizes[index];
const char *filename = get_filename(index);
if ((size == 0) || !filename[0]) {
return -1; // no data
}
if (size > max_size) {
return -2; // too large
}
uint8_t *buffer = (uint8_t *)malloc(size);
if (buffer) {
FILE *f = fopen(filename, "rb");
if (f) {
fread(buffer, size, 1, f);
fclose(f);
filebuffers.append(buffer);
return 0; // success
}
free(buffer);
return -4; // can't open file
}
return -3; // no mem
}
};
#endif
|