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|
package cgi
import (
"bytes"
"context"
"fmt"
"strings"
sr "tildegit.org/tjp/sliderule"
"tildegit.org/tjp/sliderule/gemini"
"tildegit.org/tjp/sliderule/logging"
)
// GeminiCGIDirectory runs any executable files relative to a root directory on the file system.
//
// It will also find and run any executables _part way_ through the path, so for example
// a request for /foo/bar/baz can also run an executable found at /foo or /foo/bar. In
// such a case the PATH_INFO environment variable will include the remaining portion of
// the URI path.
func GeminiCGIDirectory(pathRoot, fsRoot string) sr.Handler {
fsRoot = strings.TrimRight(fsRoot, "/")
return sr.HandlerFunc(func(ctx context.Context, request *sr.Request) *sr.Response {
if !strings.HasPrefix(request.Path, pathRoot) {
return nil
}
filepath, pathinfo, err := ResolveCGI(request.Path[len(pathRoot):], fsRoot)
if err != nil {
return gemini.Failure(err)
}
if filepath == "" {
return nil
}
stderr := &bytes.Buffer{}
stdout, exitCode, err := RunCGI(ctx, request, filepath, pathinfo, stderr)
if err != nil {
return gemini.Failure(err)
}
if exitCode != 0 {
ctx.Value("warnlog").(logging.Logger).Log(
"msg", "cgi exited with non-zero exit code",
"code", exitCode,
"stderr", stderr.String(),
)
return gemini.CGIError(fmt.Sprintf("CGI process exited with status %d", exitCode))
}
response, err := gemini.ParseResponse(stdout)
if err != nil {
return gemini.Failure(err)
}
return response
})
}
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