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Diffstat (limited to 'src/download.c')
-rw-r--r--src/download.c128
1 files changed, 104 insertions, 24 deletions
diff --git a/src/download.c b/src/download.c
index 0442b02..0e2e23f 100644
--- a/src/download.c
+++ b/src/download.c
@@ -43,26 +43,27 @@ extern char proxy_user[STR_MAX];
extern char proxy_pass[STR_MAX];
extern CURL *main_curl_handle;
-int save_file(CURL *curl_handle, char *url, char *filepath)
+int save_file(CURL *curl_handle, char *url, char *filepath, long resume_offset)
/* Save the file *url to *filepath */
{
printf("Downloading %s\n",url);
- if(curl_handle == NULL)
+ if(!curl_handle)
curl_handle = main_curl_handle;
if(curl_handle) {
FILE *file;
- if((file = fopen(filepath,"w")) == NULL)
+ file = fopen(filepath, "a");
+ if(!file)
{
fprintf(stderr,"Error: cannot open file %s for writing.\n",filepath);
return 1;
}
curl_easy_setopt(curl_handle, CURLOPT_URL, url);
+ curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, read_func);
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_func);
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, file);
- curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, read_func);
if(proxy_type != NONE)
{
@@ -98,24 +99,21 @@ int save_file(CURL *curl_handle, char *url, char *filepath)
curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 0);
curl_easy_setopt(curl_handle, CURLOPT_PROGRESSFUNCTION, update_progress);
+ curl_easy_setopt(curl_handle, CURLOPT_PROGRESSDATA, &resume_offset);
+
+ curl_easy_setopt(curl_handle, CURLOPT_RESUME_FROM, resume_offset);
+
+ /* create a buffer to hold any curl errors */
+ char errorinfo[CURL_ERROR_SIZE];
+ curl_easy_setopt(curl_handle, CURLOPT_ERRORBUFFER, errorinfo);
if(curl_easy_perform(curl_handle))
{
remove(filepath);
- fprintf(stderr,"Error, could not download %s\n",url);
+ fprintf(stderr,"\nError, could not download %s: %s\n",url, errorinfo);
return 1;
}
-/* double d;
- curl_easy_getinfo(curl_handle, CURLINFO_SIZE_DOWNLOAD, &d);
- printf("Total downloaded: %lf\n",d);
-
- curl_easy_getinfo(curl_handle, CURLINFO_SPEED_DOWNLOAD, &d);
- printf("Average speed downloaded: %lf\n",d);
-
- curl_easy_getinfo(curl_handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &d);
- printf("Content Length: %lf\n",d);
-*/
fclose(file);
printf("\n");
@@ -133,16 +131,86 @@ int update_progress(void *data, double dltotal, double dlnow,
/* Print status information */
{
double frac;
- if(dlnow > 0)
- frac = 100 * dlnow / dltotal;
+ long *startsize = NULL;
+
+ startsize = (long *)data;
+ long cur = (long) dlnow + *startsize;
+ long total = (long) dltotal + *startsize;
+
+ if(cur > 0)
+ frac = 100 * (double) cur / (double) total;
else
frac = 0;
+
printf("\rDownload progress: %3.0lf%% ", frac);
fflush(stdout);
return 0;
}
+double getremotefilesize(CURL *curl_handle, char *url)
+{
+ double filesize;
+
+ if(!curl_handle)
+ curl_handle = main_curl_handle;
+
+ if(curl_handle) {
+
+ curl_easy_setopt(curl_handle, CURLOPT_URL, url);
+ curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, read_func);
+
+ /* don't download or return either body or header */
+ curl_easy_setopt(curl_handle, CURLOPT_NOBODY, 1);
+ curl_easy_setopt(curl_handle, CURLOPT_HEADER, 0);
+
+ if(proxy_type != NONE)
+ {
+ if(proxy_type == HTTP)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
+ else if(proxy_type == SOCKS4)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
+ else if(proxy_type == SOCKS5)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
+
+ curl_easy_setopt(curl_handle, CURLOPT_PROXY, proxy_addr);
+
+ if(proxy_port)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYPORT, proxy_port);
+
+ if(proxy_auth != NOAUTH)
+ {
+ if(proxy_auth == BASIC)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYAUTH, CURLAUTH_BASIC);
+ else if(proxy_auth == DIGEST)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYAUTH, CURLAUTH_DIGEST);
+ else if(proxy_auth == NTLM)
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYAUTH, CURLAUTH_NTLM);
+
+ if(proxy_user[0] && proxy_pass[0])
+ {
+ char userpass[STR_MAX];
+ snprintf(userpass, STR_MAX, "%s:%s", proxy_user, proxy_pass);
+ curl_easy_setopt(curl_handle, CURLOPT_PROXYUSERPWD, userpass);
+ }
+ }
+ }
+
+ curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1);
+
+ if(curl_easy_perform(curl_handle))
+ filesize = -1;
+
+ curl_easy_getinfo(curl_handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &filesize);
+
+ }
+ else
+ filesize = -1;
+
+ curl_easy_reset(curl_handle);
+ return filesize;
+}
+
void downloadissue(CURL *curl_handle, char * directory, iss * issue, int force)
/* Download issue pointed to */
{
@@ -160,7 +228,7 @@ void downloadissue(CURL *curl_handle, char * directory, iss * issue, int force)
if(mkdir(newdir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH))
{
printf("Please enter the path of a directory to save issues in: ");
- scanf("%s", newdir); /* TODO: incorporate tab-completion */
+ scanf("%s", newdir);
}
int count;
@@ -170,16 +238,28 @@ void downloadissue(CURL *curl_handle, char * directory, iss * issue, int force)
snprintf(filename,STR_MAX,"%s/section_%i.pdf", newdir, cur_section->number);
if(!force){
- testfile = fopen(filename, "r");
- if(!testfile)
- save_file(curl_handle, cur_section->uri, filename);
+ struct stat fileinfo;
+ /* see if local file exists */
+ if(stat(filename, &fileinfo))
+ save_file(curl_handle, cur_section->uri, filename, 0);
else
{
- fclose(testfile);
- printf("Skipping download of section %i\n", cur_section->number);
+ /* get size of local file */
+ long localsize = 0;
+ localsize = (long) fileinfo.st_size;
+
+ /* get size of remote file */
+ long remotesize = 0;
+ remotesize = (long) getremotefilesize(curl_handle, cur_section->uri);
+
+ /* if size of local file != size of remote file, resume */
+ if(remotesize > 0 && localsize < remotesize)
+ save_file(curl_handle, cur_section->uri, filename, localsize);
+ else
+ printf("Skipping download of completed section %i\n", cur_section->number);
}
}
else
- save_file(curl_handle, cur_section->uri, filename);
+ save_file(curl_handle, cur_section->uri, filename, 0);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 04:31:15 +0000