Esempio n. 1
0
func extractQuery(ctx context.Context, r *http.Request) client.Query {
	params := r.URL.Query()
	var query client.Query
	if q, ok := params["q"]; ok {
		query = ParseQuery(q[0])
		log.Printf(ctx, "parsing query q=%q out=%s", q[0], asJSON{query})
	}
	if line, ok := params["line"]; ok {
		query.Line = line[0]
	}
	if file, ok := params["file"]; ok {
		query.File = file[0]
	}
	if repo, ok := params["repo"]; ok {
		query.Repo = repo[0]
	}
	if fc, ok := params["fold_case"]; ok && fc[0] != "" {
		query.FoldCase = true
	}
	return query
}
Esempio n. 2
0
func ParseQuery(query string) (client.Query, error) {
	ops := make(map[string]string)
	key := ""
	q := strings.TrimSpace(query)

	for {
		m := pieceRE.FindStringSubmatchIndex(q)
		if m == nil {
			ops[key] += q
			break
		}

		ops[key] += q[:m[0]]
		match := q[m[0]:m[1]]
		q = q[m[1]:]

		if match == " " {
			// A space: Ends the operator, if we're in one.
			if key == "" {
				ops[key] += " "
			} else {
				key = ""
			}
		} else if match == "(" {
			// A parenthesis. Nothing is special until the
			// end of a balanced set of parenthesis
			p := 1
			i := 0
			esc := false
			var w bytes.Buffer
			for i < len(q) {
				// We decode runes ourselves instead
				// of using range because exiting the
				// loop with i = len(q) makes the edge
				// cases simpler.
				r, l := utf8.DecodeRuneInString(q[i:])
				i += l
				switch {
				case esc:
					esc = false
				case r == '\\':
					esc = true
				case r == '(':
					p++
				case r == ')':
					p--
				}
				w.WriteRune(r)
				if p == 0 {
					break
				}
			}
			ops[key] += match + w.String()
			q = q[i:]
		} else if match[0] == '\\' {
			ops[key] += match
		} else {
			// An operator. The key is in match group 1
			if key == "" {
				key = match[m[2]-m[0] : m[3]-m[0]]
			} else {
				ops[key] += match
			}
		}
	}

	var out client.Query
	out.File = ops["file"]
	out.Repo = ops["repo"]
	out.Tags = ops["tags"]
	out.Not.File = ops["-file"]
	out.Not.Repo = ops["-repo"]
	out.Not.Tags = ops["-tags"]
	var bits []string
	for _, k := range []string{"", "case", "lit"} {
		bit := strings.TrimSpace(ops[k])
		if k == "lit" {
			bit = regexp.QuoteMeta(bit)
		}
		if len(bit) != 0 {
			bits = append(bits, bit)
		}
	}
	out.Line = strings.Join(bits, "")
	if _, ok := ops["case"]; ok {
		out.FoldCase = false
	} else if _, ok := ops["lit"]; ok {
		out.FoldCase = false
	} else {
		out.FoldCase = strings.IndexAny(out.Line, "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == -1
	}

	if len(bits) > 1 {
		return out, errors.New("You cannot provide multiple of case:, lit:, and a bare regex")
	}
	return out, nil
}
Esempio n. 3
0
func ParseQuery(query string) client.Query {
	ops := make(map[string]string)
	key := ""
	q := strings.TrimSpace(query)

	for {
		m := pieceRE.FindStringSubmatchIndex(q)
		if m == nil {
			ops[key] += q
			break
		}

		ops[key] += q[:m[0]]
		match := q[m[0]:m[1]]
		q = q[m[1]:]

		if match == " " {
			// A space: Ends the operator, if we're in one.
			if key == "" {
				ops[key] += " "
			} else {
				key = ""
			}
		} else if match == "(" {
			// A parenthesis. Nothing is special until the
			// end of a balanced set of parenthesis
			p := 1
			i := 0
			esc := false
			var w bytes.Buffer
			for i < len(q) {
				// We decode runes ourselves instead
				// of using range because exiting the
				// loop with i = len(q) makes the edge
				// cases simpler.
				r, l := utf8.DecodeRuneInString(q[i:])
				i += l
				switch {
				case esc:
					esc = false
				case r == '\\':
					esc = true
				case r == '(':
					p++
				case r == ')':
					p--
				}
				w.WriteRune(r)
				if p == 0 {
					break
				}
			}
			ops[key] += match + w.String()
			q = q[i:]
		} else if match[0] == '\\' {
			ops[key] += match
		} else {
			// An operator. The key is in match group 1
			if key == "" {
				key = match[m[2]-m[0] : m[3]-m[0]]
			} else {
				ops[key] += match
			}
		}
	}

	var out client.Query
	out.File = ops["file"]
	out.Repo = ops["repo"]
	out.Not.File = ops["-file"]
	out.Not.Repo = ops["-repo"]
	out.Line = strings.TrimSpace(ops[""] + ops["case"] + regexp.QuoteMeta(ops["lit"]))
	if _, ok := ops["case"]; ok {
		out.FoldCase = false
	} else {
		out.FoldCase = strings.IndexAny(out.Line, "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == -1
	}

	return out
}