curl: report errors and follow redirects

- curl -f will report an error code if the source reports 404 which
happens if the mirror doesn't contain the file. Otherwise we are left
with an invalid file.
- curl -L will follow redirects (302), which sourceforge uses sometimes.
Before we downloaded an invalid file (html page).
- verify_archive will no longer accept empty files as valid

diff --git a/candi.sh b/candi.sh
index 1d2942dbe4366db773ed2f8acd9e54a39df360b4..263f129e93a30baa5413aa31b5826e8582adab3a 100755 (executable)
--- a/candi.sh
+++ b/candi.sh
@@ -153,6 +153,11 @@ verify_archive() {
     if [ ! -e ${ARCHIVE_FILE} ]; then
         return 2
     fi
+
+    # empty file?
+    if [ ! -s ${ARCHIVE_FILE} ]; then
+        return 2
+    fi
     
     # Check CHECKSUM has been specified for the package
     if [ -z "${CHECKSUM}" ]; then
@@ -242,14 +247,14 @@ download_archive () {
         # Download.
         # If curl or wget is failing, continue this loop for trying an other mirror.
         if [ ${DOWNLOADER} = "curl" ]; then
-            curl -k -O ${url} || continue
+            curl -f -L -k -O ${url} || continue
         elif [ ${DOWNLOADER} = "wget" ]; then
             wget --no-check-certificate ${url} -O ${ARCHIVE_FILE} || continue
         else
             cecho ${BAD} "candi: Unknown downloader: ${DOWNLOADER}"
             exit 1
         fi
-        
+
         unset url
         
         # Verify the download