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author | Christopher Speller <crspeller@gmail.com> | 2018-07-26 08:31:22 -0700 |
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committer | GitHub <noreply@github.com> | 2018-07-26 08:31:22 -0700 |
commit | bae26ec268aef4e85d5055f1b83c6b3992bf178f (patch) | |
tree | 74ab5e508661068b30516c704ffc0a9b02efa8d5 /vendor/github.com/rs/cors/utils.go | |
parent | 185ed89978e0d88d75b5c606104e78058753bd4d (diff) | |
download | chat-bae26ec268aef4e85d5055f1b83c6b3992bf178f.tar.gz chat-bae26ec268aef4e85d5055f1b83c6b3992bf178f.tar.bz2 chat-bae26ec268aef4e85d5055f1b83c6b3992bf178f.zip |
MM-11160 Adding proper CORS support. (#9152)
* Adding proper CORS support.
* Better CORS tests.
Diffstat (limited to 'vendor/github.com/rs/cors/utils.go')
-rw-r--r-- | vendor/github.com/rs/cors/utils.go | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/vendor/github.com/rs/cors/utils.go b/vendor/github.com/rs/cors/utils.go new file mode 100644 index 000000000..c7a0aa060 --- /dev/null +++ b/vendor/github.com/rs/cors/utils.go @@ -0,0 +1,70 @@ +package cors + +import "strings" + +const toLower = 'a' - 'A' + +type converter func(string) string + +type wildcard struct { + prefix string + suffix string +} + +func (w wildcard) match(s string) bool { + return len(s) >= len(w.prefix+w.suffix) && strings.HasPrefix(s, w.prefix) && strings.HasSuffix(s, w.suffix) +} + +// convert converts a list of string using the passed converter function +func convert(s []string, c converter) []string { + out := []string{} + for _, i := range s { + out = append(out, c(i)) + } + return out +} + +// parseHeaderList tokenize + normalize a string containing a list of headers +func parseHeaderList(headerList string) []string { + l := len(headerList) + h := make([]byte, 0, l) + upper := true + // Estimate the number headers in order to allocate the right splice size + t := 0 + for i := 0; i < l; i++ { + if headerList[i] == ',' { + t++ + } + } + headers := make([]string, 0, t) + for i := 0; i < l; i++ { + b := headerList[i] + if b >= 'a' && b <= 'z' { + if upper { + h = append(h, b-toLower) + } else { + h = append(h, b) + } + } else if b >= 'A' && b <= 'Z' { + if !upper { + h = append(h, b+toLower) + } else { + h = append(h, b) + } + } else if b == '-' || b == '_' || (b >= '0' && b <= '9') { + h = append(h, b) + } + + if b == ' ' || b == ',' || i == l-1 { + if len(h) > 0 { + // Flush the found header + headers = append(headers, string(h)) + h = h[:0] + upper = true + } + } else { + upper = b == '-' || b == '_' + } + } + return headers +} |