/**
* Parses a header value. This is called from the generated bytecode.
*
* @param buffer The buffer
* @param remaining The number of bytes remaining
* @param state The current state
* @param builder The exchange builder
* @return The number of bytes remaining
*/
@SuppressWarnings("unused")
final int handleHeaderValue(
ByteBuffer buffer, int remaining, ParseState state, HttpExchangeBuilder builder) {
StringBuilder stringBuilder = state.stringBuilder;
if (stringBuilder == null) {
stringBuilder = new StringBuilder();
}
int parseState = state.parseState;
while (remaining > 0) {
final byte next = buffer.get();
--remaining;
switch (parseState) {
case NORMAL:
{
if (next == '\r') {
parseState = BEGIN_LINE_END;
} else if (next == '\n') {
parseState = LINE_END;
} else if (next == ' ' || next == '\t') {
parseState = WHITESPACE;
} else {
stringBuilder.append((char) next);
}
break;
}
case WHITESPACE:
{
if (next == '\r') {
parseState = BEGIN_LINE_END;
} else if (next == '\n') {
parseState = LINE_END;
} else if (next == ' ' || next == '\t') {
} else {
if (stringBuilder.length() > 0) {
stringBuilder.append(' ');
}
stringBuilder.append((char) next);
parseState = NORMAL;
}
break;
}
case LINE_END:
case BEGIN_LINE_END:
{
if (next == '\n' && parseState == BEGIN_LINE_END) {
parseState = LINE_END;
} else if (next == '\t' || next == ' ') {
// this is a continuation
parseState = WHITESPACE;
} else {
// we have a header
String nextStandardHeader = state.nextHeader;
builder.headers.put(nextStandardHeader, stringBuilder.toString());
state.nextHeader = null;
state.leftOver = next;
state.stringBuilder = null;
if (next == '\r') {
parseState = AWAIT_DATA_END;
} else {
state.state = ParseState.HEADER;
state.parseState = 0;
return remaining;
}
}
break;
}
case AWAIT_DATA_END:
{
state.state = ParseState.PARSE_COMPLETE;
return remaining;
}
}
}
// we only write to the state if we did not finish parsing
state.parseState = parseState;
state.stringBuilder = stringBuilder;
return remaining;
}
/**
* Parses a path value. This is called from the generated bytecode.
*
* @param buffer The buffer
* @param remaining The number of bytes remaining
* @param state The current state
* @param builder The exchange builder
* @return The number of bytes remaining
*/
@SuppressWarnings("unused")
final int handlePath(
ByteBuffer buffer, int remaining, ParseState state, HttpExchangeBuilder builder) {
StringBuilder stringBuilder = state.stringBuilder;
int parseState = state.parseState;
int canonicalPathStart = state.pos;
int queryParamPos = state.queryParamPos;
String nextQueryParam = state.nextHeader;
if (stringBuilder == null) {
state.stringBuilder = stringBuilder = new StringBuilder();
}
while (remaining > 0) {
final char next = (char) buffer.get();
--remaining;
if (next == ' ' || next == '\t') {
if (stringBuilder.length() != 0) {
final String path = stringBuilder.toString();
builder.fullPath = path;
if (parseState < HOST_DONE) {
builder.relativePath = path;
} else {
builder.relativePath = path.substring(canonicalPathStart);
}
if (parseState == QUERY_PARAM_NAME) {
builder.addQueryParam(stringBuilder.substring(queryParamPos), "");
} else if (parseState == QUERY_PARAM_VALUE) {
builder.addQueryParam(nextQueryParam, stringBuilder.substring(queryParamPos));
}
state.state = ParseState.VERSION;
state.stringBuilder = null;
state.parseState = 0;
state.pos = 0;
state.nextHeader = null;
state.queryParamPos = 0;
return remaining;
}
} else {
if (next == ':' && parseState == START) {
parseState = FIRST_COLON;
} else if (next == '/' && parseState == FIRST_COLON) {
parseState = FIRST_SLASH;
} else if (next == '/' && parseState == FIRST_SLASH) {
parseState = SECOND_SLASH;
} else if (next == '/' && parseState == SECOND_SLASH) {
parseState = HOST_DONE;
canonicalPathStart = stringBuilder.length();
} else if (parseState == FIRST_COLON || parseState == FIRST_SLASH) {
parseState = START;
} else if (next == '?' && (parseState == START || parseState == HOST_DONE)) {
parseState = QUERY_PARAM_NAME;
queryParamPos = stringBuilder.length() + 1;
} else if (next == '=' && parseState == QUERY_PARAM_NAME) {
parseState = QUERY_PARAM_VALUE;
nextQueryParam = stringBuilder.substring(queryParamPos);
queryParamPos = stringBuilder.length() + 1;
} else if (next == '&' && parseState == QUERY_PARAM_NAME) {
parseState = QUERY_PARAM_NAME;
builder.addQueryParam(stringBuilder.substring(queryParamPos), "");
nextQueryParam = null;
queryParamPos = stringBuilder.length() + 1;
} else if (next == '&' && parseState == QUERY_PARAM_VALUE) {
parseState = QUERY_PARAM_NAME;
builder.addQueryParam(nextQueryParam, stringBuilder.substring(queryParamPos));
nextQueryParam = null;
queryParamPos = stringBuilder.length() + 1;
}
stringBuilder.append(next);
}
}
state.stringBuilder = stringBuilder;
state.parseState = parseState;
state.pos = canonicalPathStart;
state.nextHeader = nextQueryParam;
state.queryParamPos = queryParamPos;
return remaining;
}
