diff options
Diffstat (limited to 'vendor/github.com/munnerz/goautoneg/autoneg.go')
| -rw-r--r-- | vendor/github.com/munnerz/goautoneg/autoneg.go | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/vendor/github.com/munnerz/goautoneg/autoneg.go b/vendor/github.com/munnerz/goautoneg/autoneg.go deleted file mode 100644 index 1dd1cad64..000000000 --- a/vendor/github.com/munnerz/goautoneg/autoneg.go +++ /dev/null @@ -1,189 +0,0 @@ -/* -HTTP Content-Type Autonegotiation. - -The functions in this package implement the behaviour specified in -http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html - -Copyright (c) 2011, Open Knowledge Foundation Ltd. -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are -met: - - Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in - the documentation and/or other materials provided with the - distribution. - - Neither the name of the Open Knowledge Foundation Ltd. nor the - names of its contributors may be used to endorse or promote - products derived from this software without specific prior written - permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -package goautoneg - -import ( - "sort" - "strconv" - "strings" -) - -// Structure to represent a clause in an HTTP Accept Header -type Accept struct { - Type, SubType string - Q float64 - Params map[string]string -} - -// acceptSlice is defined to implement sort interface. -type acceptSlice []Accept - -func (slice acceptSlice) Len() int { - return len(slice) -} - -func (slice acceptSlice) Less(i, j int) bool { - ai, aj := slice[i], slice[j] - if ai.Q > aj.Q { - return true - } - if ai.Type != "*" && aj.Type == "*" { - return true - } - if ai.SubType != "*" && aj.SubType == "*" { - return true - } - return false -} - -func (slice acceptSlice) Swap(i, j int) { - slice[i], slice[j] = slice[j], slice[i] -} - -func stringTrimSpaceCutset(r rune) bool { - return r == ' ' -} - -func nextSplitElement(s, sep string) (item string, remaining string) { - if index := strings.Index(s, sep); index != -1 { - return s[:index], s[index+1:] - } - return s, "" -} - -// Parse an Accept Header string returning a sorted list -// of clauses -func ParseAccept(header string) acceptSlice { - partsCount := 0 - remaining := header - for len(remaining) > 0 { - partsCount++ - _, remaining = nextSplitElement(remaining, ",") - } - accept := make(acceptSlice, 0, partsCount) - - remaining = header - var part string - for len(remaining) > 0 { - part, remaining = nextSplitElement(remaining, ",") - part = strings.TrimFunc(part, stringTrimSpaceCutset) - - a := Accept{ - Q: 1.0, - } - - sp, remainingPart := nextSplitElement(part, ";") - - sp0, spRemaining := nextSplitElement(sp, "/") - a.Type = strings.TrimFunc(sp0, stringTrimSpaceCutset) - - switch { - case len(spRemaining) == 0: - if a.Type == "*" { - a.SubType = "*" - } else { - continue - } - default: - var sp1 string - sp1, spRemaining = nextSplitElement(spRemaining, "/") - if len(spRemaining) > 0 { - continue - } - a.SubType = strings.TrimFunc(sp1, stringTrimSpaceCutset) - } - - if len(remainingPart) == 0 { - accept = append(accept, a) - continue - } - - a.Params = make(map[string]string) - for len(remainingPart) > 0 { - sp, remainingPart = nextSplitElement(remainingPart, ";") - sp0, spRemaining = nextSplitElement(sp, "=") - if len(spRemaining) == 0 { - continue - } - var sp1 string - sp1, spRemaining = nextSplitElement(spRemaining, "=") - if len(spRemaining) != 0 { - continue - } - token := strings.TrimFunc(sp0, stringTrimSpaceCutset) - if token == "q" { - a.Q, _ = strconv.ParseFloat(sp1, 32) - } else { - a.Params[token] = strings.TrimFunc(sp1, stringTrimSpaceCutset) - } - } - - accept = append(accept, a) - } - - sort.Sort(accept) - return accept -} - -// Negotiate the most appropriate content_type given the accept header -// and a list of alternatives. -func Negotiate(header string, alternatives []string) (content_type string) { - asp := make([][]string, 0, len(alternatives)) - for _, ctype := range alternatives { - asp = append(asp, strings.SplitN(ctype, "/", 2)) - } - for _, clause := range ParseAccept(header) { - for i, ctsp := range asp { - if clause.Type == ctsp[0] && clause.SubType == ctsp[1] { - content_type = alternatives[i] - return - } - if clause.Type == ctsp[0] && clause.SubType == "*" { - content_type = alternatives[i] - return - } - if clause.Type == "*" && clause.SubType == "*" { - content_type = alternatives[i] - return - } - } - } - return -} |