static string UrlEncode(string value, PhpQueryRfc type)
{
if (string.IsNullOrEmpty(value))
{
return(string.Empty);
}
switch (type)
{
case PhpQueryRfc.RFC3986:
// NOTE: this is not correct,
// behavior depends on IRI configuration
// see https://docs.microsoft.com/en-us/dotnet/api/system.uri.escapeuristring#remarks
return(Uri.EscapeUriString(value));
case PhpQueryRfc.RFC1738:
default:
// ' ' encoded as '+'
return(WebUtility.UrlEncode(value));
}
}
static string http_build_query(Context ctx, PhpValue formData, string numericPrefix, string argSeparator, PhpQueryRfc encType, string indexerPrefix)
{
var result = new StringBuilder(64);
var first = true;
var enumerator = formData.GetForeachEnumerator(false, default);
while (enumerator.MoveNext())
{
var key = enumerator.CurrentKey;
var value = enumerator.CurrentValue;
// the query parameter name (key name)
// the parameter name is URL encoded
string keyName = key.IsLong(out var l)
? UrlEncode(numericPrefix, encType) + l.ToString()
: UrlEncode(key.ToStringOrThrow(ctx), encType);
if (indexerPrefix != null)
{
keyName = indexerPrefix + "%5B" + keyName + "%5D"; // == prefix[key] (url encoded brackets)
}
// write the query element
if (value.IsPhpArray(out var valueArray))
{
// value is an array, emit query recursively, use current keyName as an array variable name
var queryStr = http_build_query(ctx, valueArray, null, argSeparator, encType, keyName); // emit the query recursively
if (string.IsNullOrEmpty(queryStr) == false)
{
if (!first)
{
result.Append(argSeparator);
}
result.Append(queryStr);
}
}
else
{
// simple value, emit query in a form of (key=value), URL encoded !
if (!first)
{
result.Append(argSeparator);
}
result.Append(keyName);
result.Append("=");
result.Append(UrlEncode(value.ToStringOrThrow(ctx), encType)); // == "keyName=keyValue"
}
// separator will be used in next loop
first = false;
}
return(result.ToString());
}