IPFS: bugfixes

- Fixed endianness bug in gateway file parsing
- Use IPFS_PATH in tests where IPFS_DATA was used
- Fixed typos from traling -> trailing
- Fixed broken link in IPFS.md

Follow-up to 859e88f653

Reported-by: Michael Kaufmann
Bug: https://github.com/curl/curl/pull/12152#issuecomment-1798214137
Closes #12305

docs/IPFS.md

@@ -69,7 +69,7 @@ If you trust this behavior from your gateway of choice then passing the `-L` opt
 Depending on the arguments, cURL could present the user with an error.
 
 ### Gateway file and environment variable
-cURL tried to look for the file: `~/.ipfs/gateway` but couldn't find it. It also tried to look for the `IPFS_GATEWAY` environment variable but couldn't find that either. This happens when no extra arguments are passed to cURL and letting it try to figure it out [automatically](#Automatic-gateway-detection).
+cURL tried to look for the file: `~/.ipfs/gateway` but couldn't find it. It also tried to look for the `IPFS_GATEWAY` environment variable but couldn't find that either. This happens when no extra arguments are passed to cURL and letting it try to figure it out [automatically](#automatic-gateway-detection).
 
 Any IPFS implementation that has gateway support should expose it's URL in `~/.ipfs/gateway`. If you are already running a gateway, make sure it exposes the file where cURL expects to find it.
 

src/tool_ipfs.c

@@ -104,7 +104,8 @@ static char *ipfs_gateway(void)
 
     /* get the first line of the gateway file, ignore the rest */
     while((c = getc(gateway_file)) != EOF && c != '\n' && c != '\r') {
-      if(curlx_dyn_addn(&dyn, &c, 1))
+      char c_char = (char)c;
+      if(curlx_dyn_addn(&dyn, &c_char, 1))
         goto fail;
     }
 

tests/data/test736

@@ -31,11 +31,10 @@ Hello curl from IPFS
 http
 </server>
 <setenv>
-HOME=%PWD/%LOGDIR
-IPFS_DATA=$HOME/.ipfs
+IPFS_PATH=%LOGDIR/.ipfs
 </setenv>
 <name>
-IPFS with IPFS_DATA set, no traling slash
+IPFS with IPFS_PATH set, no trailing slash
 </name>
 <command>
 ipfs://bafybeidecnvkrygux6uoukouzps5ofkeevoqland7kopseiod6pzqvjg7u

tests/data/test737

@@ -31,11 +31,10 @@ Hello curl from IPFS
 http
 </server>
 <setenv>
-HOME=%PWD/%LOGDIR
-IPFS_DATA=$HOME/.ipfs/
+IPFS_PATH=%LOGDIR/.ipfs/
 </setenv>
 <name>
-IPFS with IPFS_DATA set, with traling slash
+IPFS with IPFS_PATH set, with trailing slash
 </name>
 <command>
 ipfs://bafybeidecnvkrygux6uoukouzps5ofkeevoqland7kopseiod6pzqvjg7u

tests/data/test738

@@ -17,11 +17,10 @@ IPFS
 http
 </server>
 <setenv>
-HOME=%PWD/%LOGDIR
-IPFS_DATA=%HOME/.ipfs/
+IPFS_PATH=%LOGDIR/.ipfs/
 </setenv>
 <name>
-IPFS with IPFS_DATA, no gateway file
+IPFS with IPFS_PATH, no gateway file
 </name>
 <command>
 ipfs://bafybeidecnvkrygux6uoukouzps5ofkeevoqland7kopseiod6pzqvjg7u