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Check for incomplete downloads before saving

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Downloads should only fail like this is if your WiFi signal is poor, your internet connection is awful or the server is experiencing issues.
This commit is contained in:
wiidev 2020-04-14 21:40:38 +01:00
parent 750614e055
commit 4da7f23e9a
1 changed files with 23 additions and 9 deletions
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32
source/network/https.c
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@ -103,7 +103,7 @@ u8 is_chunked(struct phr_header *headers, size_t num_headers)
return (strcasecmp(encoding, "chunked") == 0) ? 1 : 0; return (strcasecmp(encoding, "chunked") == 0) ? 1 : 0;
} }
void read_chunked(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos) u8 read_chunked(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos)
{ {
struct phr_chunked_decoder decoder = {}; struct phr_chunked_decoder decoder = {};
size_t capacity = 4096, rsize; size_t capacity = 4096, rsize;
@ -129,7 +129,7 @@ void read_chunked(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos
#ifdef DEBUG_NETWORK #ifdef DEBUG_NETWORK
gprintf("IO error\n"); gprintf("IO error\n");
#endif #endif
return; return 0;
} }
rsize = rret; rsize = rret;
pret = phr_decode_chunked(&decoder, &buffer->data[start_pos], &rsize); pret = phr_decode_chunked(&decoder, &buffer->data[start_pos], &rsize);
@ -138,15 +138,16 @@ void read_chunked(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos
#ifdef DEBUG_NETWORK #ifdef DEBUG_NETWORK
gprintf("Parse error\n"); gprintf("Parse error\n");
#endif #endif
return; return 0;
} }
start_pos += rsize; start_pos += rsize;
} while (pret == -2); } while (pret == -2);
buffer->size = start_pos; buffer->size = start_pos;
buffer->data = MEM2_realloc(buffer->data, buffer->size); buffer->data = MEM2_realloc(buffer->data, buffer->size);
return 1;
} }
void read_all(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos) u8 read_all(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos)
{ {
size_t capacity = 4096; size_t capacity = 4096;
ssize_t ret; ssize_t ret;
@ -165,13 +166,16 @@ void read_all(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos)
} }
while ((ret = https_read(httpinfo, &buffer->data[start_pos], capacity - start_pos)) == -1 && errno == EINTR) while ((ret = https_read(httpinfo, &buffer->data[start_pos], capacity - start_pos)) == -1 && errno == EINTR)
; ;
if (ret <= 0) if (ret == 0)
break; break;
if (ret < 0)
return 0;
start_pos += ret; start_pos += ret;
}; };
buffer->size = start_pos; buffer->size = start_pos;
buffer->data = MEM2_realloc(buffer->data, buffer->size); buffer->data = MEM2_realloc(buffer->data, buffer->size);
return 1;
} }
int connect(char *host, u16 port) int connect(char *host, u16 port)
@ -383,7 +387,7 @@ void downloadfile(const char *url, struct download *buffer)
// Get the response // Get the response
char response[4096]; char response[4096];
struct phr_header headers[100]; struct phr_header headers[100];
int pret, minor_version, status; int pret, minor_version, status, dl_valid;
size_t buflen = 0, prevbuflen = 0, num_headers, msg_len; size_t buflen = 0, prevbuflen = 0, num_headers, msg_len;
ssize_t rret; ssize_t rret;
const char *msg; const char *msg;
@ -454,13 +458,23 @@ void downloadfile(const char *url, struct download *buffer)
if (status == 200) if (status == 200)
{ {
buffer->data = MEM2_alloc(4096); buffer->data = MEM2_alloc(4096);
buffer->size = 4096;
memcpy(buffer->data, &response[pret], buflen - pret); memcpy(buffer->data, &response[pret], buflen - pret);
// Determine how to read the data // Determine how to read the data
if (is_chunked(headers, num_headers)) if (is_chunked(headers, num_headers))
read_chunked(&httpinfo, buffer, buflen - pret); dl_valid = read_chunked(&httpinfo, buffer, buflen - pret);
else else
read_all(&httpinfo, buffer, buflen - pret); dl_valid = read_all(&httpinfo, buffer, buflen - pret);
// Check if the download is incomplete
if (!dl_valid || buffer->size <= 0)
{
buffer->size = 0;
MEM2_free(buffer->data);
#ifdef DEBUG_NETWORK
gprintf("Removed incomplete download\n");
#endif
https_close(&httpinfo);
return;
}
// Save the session // Save the session
if (httpinfo.use_https) if (httpinfo.use_https)
session = wolfSSL_get_session(httpinfo.ssl); session = wolfSSL_get_session(httpinfo.ssl);