|
public GetQuotedStringValue ( |
||
| start | ||
| return | string | |
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
parsedValue = null;
if (input == null)
return true;
var value = new CacheControlHeaderValue ();
var lexer = new Lexer (input);
Token t;
do {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
string s = lexer.GetStringValue (t);
bool token_read = false;
TimeSpan? ts;
switch (s) {
case "no-store":
value.NoStore = true;
break;
case "no-transform":
value.NoTransform = true;
break;
case "only-if-cached":
value.OnlyIfCached = true;
break;
case "public":
value.Public = true;
break;
case "must-revalidate":
value.MustRevalidate = true;
break;
case "proxy-revalidate":
value.ProxyRevalidate = true;
break;
case "max-stale":
value.MaxStale = true;
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual) {
token_read = true;
break;
}
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
ts = lexer.TryGetTimeSpanValue (t);
if (ts == null)
return false;
value.MaxStaleLimit = ts;
break;
case "max-age":
case "s-maxage":
case "min-fresh":
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual) {
return false;
}
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
ts = lexer.TryGetTimeSpanValue (t);
if (ts == null)
return false;
switch (s.Length) {
case 7:
value.MaxAge = ts;
break;
case 8:
value.SharedMaxAge = ts;
break;
default:
value.MinFresh = ts;
break;
}
break;
case "private":
case "no-cache":
if (s.Length == 7) {
value.Private = true;
} else {
value.NoCache = true;
}
t = lexer.Scan ();
if (t != Token.Type.SeparatorEqual) {
token_read = true;
break;
}
t = lexer.Scan ();
if (t != Token.Type.QuotedString)
return false;
foreach (var entry in lexer.GetQuotedStringValue (t).Split (',')) {
var qs = entry.Trim ('\t', ' ');
if (s.Length == 7) {
value.PrivateHeaders.Add (qs);
} else {
value.NoCache = true;
value.NoCacheHeaders.Add (qs);
}
}
break;
default:
string name = lexer.GetStringValue (t);
string svalue = null;
t = lexer.Scan ();
if (t == Token.Type.SeparatorEqual) {
t = lexer.Scan ();
switch (t.Kind) {
case Token.Type.Token:
case Token.Type.QuotedString:
svalue = lexer.GetStringValue (t);
break;
default:
return false;
}
} else {
token_read = true;
}
value.Extensions.Add (NameValueHeaderValue.Create (name, svalue));
break;
}
if (!token_read)
t = lexer.Scan ();
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
return false;
parsedValue = value;
return true;
}
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
parsedValue = null;
if (input == null)
{
return(true);
}
var value = new CacheControlHeaderValue();
var lexer = new Lexer(input);
Token t;
do
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
string s = lexer.GetStringValue(t);
bool token_read = false;
TimeSpan?ts;
switch (s)
{
case "no-store":
value.NoStore = true;
break;
case "no-transform":
value.NoTransform = true;
break;
case "only-if-cached":
value.OnlyIfCached = true;
break;
case "public":
value.Public = true;
break;
case "must-revalidate":
value.MustRevalidate = true;
break;
case "proxy-revalidate":
value.ProxyRevalidate = true;
break;
case "max-stale":
value.MaxStale = true;
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
token_read = true;
break;
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
ts = lexer.TryGetTimeSpanValue(t);
if (ts == null)
{
return(false);
}
value.MaxStaleLimit = ts;
break;
case "max-age":
case "s-maxage":
case "min-fresh":
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
return(false);
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
ts = lexer.TryGetTimeSpanValue(t);
if (ts == null)
{
return(false);
}
switch (s.Length)
{
case 7:
value.MaxAge = ts;
break;
case 8:
value.SharedMaxAge = ts;
break;
default:
value.MinFresh = ts;
break;
}
break;
case "private":
case "no-cache":
if (s.Length == 7)
{
value.Private = true;
}
else
{
value.NoCache = true;
}
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
token_read = true;
break;
}
t = lexer.Scan();
if (t != Token.Type.QuotedString)
{
return(false);
}
foreach (var entry in lexer.GetQuotedStringValue(t).Split(','))
{
var qs = entry.Trim('\t', ' ');
if (s.Length == 7)
{
value.PrivateHeaders.Add(qs);
}
else
{
value.NoCache = true;
value.NoCacheHeaders.Add(qs);
}
}
break;
default:
string name = lexer.GetStringValue(t);
string svalue = null;
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
switch (t.Kind)
{
case Token.Type.Token:
case Token.Type.QuotedString:
svalue = lexer.GetStringValue(t);
break;
default:
return(false);
}
}
else
{
token_read = true;
}
value.Extensions.Add(NameValueHeaderValue.Create(name, svalue));
break;
}
if (!token_read)
{
t = lexer.Scan();
}
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
{
return(false);
}
parsedValue = value;
return(true);
}