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#include "gmrequest.h"
#include "gmutil.h"
#include <the_Foundation/file.h>
#include <the_Foundation/tlsrequest.h>
#include <the_Foundation/mutex.h>
#include <SDL_timer.h>
static const int BODY_TIMEOUT = 1500; /* ms */
enum iGmRequestState {
initialized_GmRequestState,
receivingHeader_GmRequestState,
receivingBody_GmRequestState,
finished_GmRequestState
};
struct Impl_GmRequest {
iObject object;
iMutex mutex;
enum iGmRequestState state;
iString url;
iTlsRequest *req;
enum iGmStatusCode code;
iString header;
iBlock body; /* rest of the received data */
uint32_t timeoutId; /* in case server doesn't close the connection */
iAudience *updated;
iAudience *finished;
};
iDefineObjectConstruction(GmRequest)
iDefineAudienceGetter(GmRequest, updated)
iDefineAudienceGetter(GmRequest, finished)
void init_GmRequest(iGmRequest *d) {
init_Mutex(&d->mutex);
d->state = initialized_GmRequestState;
init_String(&d->url);
d->req = NULL;
d->code = none_GmStatusCode;
init_String(&d->header);
init_Block(&d->body, 0);
d->timeoutId = 0;
d->updated = NULL;
d->finished = NULL;
}
void deinit_GmRequest(iGmRequest *d) {
if (d->req) {
iDisconnectObject(TlsRequest, d->req, readyRead, d);
iDisconnectObject(TlsRequest, d->req, finished, d);
}
lock_Mutex(&d->mutex);
if (d->timeoutId) {
SDL_RemoveTimer(d->timeoutId);
}
if (!isFinished_GmRequest(d)) {
unlock_Mutex(&d->mutex);
cancel_TlsRequest(d->req);
d->state = finished_GmRequestState;
}
else {
unlock_Mutex(&d->mutex);
}
iRelease(d->req);
d->req = NULL;
delete_Audience(d->finished);
delete_Audience(d->updated);
deinit_Block(&d->body);
deinit_String(&d->header);
deinit_String(&d->url);
deinit_Mutex(&d->mutex);
}
void setUrl_GmRequest(iGmRequest *d, const iString *url) {
set_String(&d->url, url);
urlEncodeSpaces_String(&d->url);
}
static uint32_t timedOutWhileReceivingBody_GmRequest_(uint32_t interval, void *obj) {
iGmRequest *d = obj;
iGuardMutex(&d->mutex, cancel_TlsRequest(d->req));
iUnused(interval);
return 0;
}
static void restartTimeout_GmRequest_(iGmRequest *d) {
/* Note: `d` is currently locked. */
if (d->timeoutId) {
SDL_RemoveTimer(d->timeoutId);
}
d->timeoutId = SDL_AddTimer(BODY_TIMEOUT, timedOutWhileReceivingBody_GmRequest_, d);
}
static void readIncoming_GmRequest_(iAnyObject *obj) {
iGmRequest *d = (iGmRequest *) obj;
iBool notifyUpdate = iFalse;
iBool notifyDone = iFalse;
lock_Mutex(&d->mutex);
iAssert(d->state != finished_GmRequestState); /* notifications out of order? */
iBlock *data = readAll_TlsRequest(d->req);
fflush(stdout);
if (d->state == receivingHeader_GmRequestState) {
appendCStrN_String(&d->header, constData_Block(data), size_Block(data));
/* Check if the header line is complete. */
size_t endPos = indexOfCStr_String(&d->header, "\r\n");
if (endPos != iInvalidPos) {
/* Move remainder to the body. */
setData_Block(&d->body,
constBegin_String(&d->header) + endPos + 2,
size_String(&d->header) - endPos - 2);
remove_Block(&d->header.chars, endPos, iInvalidSize);
/* parse and remove the code */
if (size_String(&d->header) < 3) {
clear_String(&d->header);
d->code = invalidHeader_GmStatusCode;
d->state = finished_GmRequestState;
notifyDone = iTrue;
}
const int code = toInt_String(&d->header);
if (code == 0 || cstr_String(&d->header)[2] != ' ') {
clear_String(&d->header);
d->code = invalidHeader_GmStatusCode;
d->state = finished_GmRequestState;
notifyDone = iTrue;
}
remove_Block(&d->header.chars, 0, 3); /* just the meta */
if (code == success_GmStatusCode && isEmpty_String(&d->header)) {
setCStr_String(&d->header, "text/gemini; charset=utf-8"); /* default */
}
d->code = code;
d->state = receivingBody_GmRequestState;
notifyUpdate = iTrue;
/* Start a timeout for the remainder of the response, in case the connection
remains open. */
restartTimeout_GmRequest_(d);
}
}
else if (d->state == receivingBody_GmRequestState) {
append_Block(&d->body, data);
restartTimeout_GmRequest_(d);
notifyUpdate = iTrue;
}
delete_Block(data);
unlock_Mutex(&d->mutex);
if (notifyUpdate) {
iNotifyAudience(d, updated, GmRequestUpdated);
}
if (notifyDone) {
iNotifyAudience(d, finished, GmRequestFinished);
}
}
static void requestFinished_GmRequest_(iAnyObject *obj) {
iGmRequest *d = (iGmRequest *) obj;
lock_Mutex(&d->mutex);
/* There shouldn't be anything left to read. */ {
iBlock *data = readAll_TlsRequest(d->req);
iAssert(isEmpty_Block(data));
delete_Block(data);
}
SDL_RemoveTimer(d->timeoutId);
d->timeoutId = 0;
d->state = finished_GmRequestState;
unlock_Mutex(&d->mutex);
iNotifyAudience(d, finished, GmRequestFinished);
}
void submit_GmRequest(iGmRequest *d) {
iAssert(d->state == initialized_GmRequestState);
if (d->state != initialized_GmRequestState) {
return;
}
d->code = none_GmStatusCode;
clear_String(&d->header);
clear_Block(&d->body);
iUrl url;
init_Url(&url, &d->url);
if (!cmpCStrSc_Rangecc(&url.protocol, "file", &iCaseInsensitive)) {
iString *path = collect_String(urlDecode_String(collect_String(newRange_String(url.path))));
iFile * f = new_File(path);
if (open_File(f, readOnly_FileMode)) {
/* TODO: Check supported file types: images, audio */
/* TODO: Detect text files based on contents? E.g., is the content valid UTF-8. */
d->code = success_GmStatusCode;
if (endsWithCase_String(path, ".gmi")) {
setCStr_String(&d->header, "text/gemini; charset=utf-8");
}
else if (endsWithCase_String(path, ".txt")) {
setCStr_String(&d->header, "text/plain");
}
else if (endsWithCase_String(path, ".png")) {
setCStr_String(&d->header, "image/png");
}
else if (endsWithCase_String(path, ".jpg") || endsWithCase_String(path, ".jpeg")) {
setCStr_String(&d->header, "image/jpeg");
}
else if (endsWithCase_String(path, ".gif")) {
setCStr_String(&d->header, "image/gif");
}
else {
setCStr_String(&d->header, "application/octet-stream");
}
set_Block(&d->body, collect_Block(readAll_File(f)));
iNotifyAudience(d, updated, GmRequestUpdated);
}
else {
d->code = failedToOpenFile_GmStatusCode;
setCStr_String(&d->header, cstr_String(path));
}
iRelease(f);
d->state = finished_GmRequestState;
iNotifyAudience(d, finished, GmRequestFinished);
return;
}
d->state = receivingHeader_GmRequestState;
d->req = new_TlsRequest();
iConnect(TlsRequest, d->req, readyRead, d, readIncoming_GmRequest_);
iConnect(TlsRequest, d->req, finished, d, requestFinished_GmRequest_);
uint16_t port = toInt_String(collect_String(newRange_String(url.port)));
if (port == 0) {
port = 1965; /* default Gemini port */
}
setUrl_TlsRequest(d->req, collect_String(newRange_String(url.host)), port);
setContent_TlsRequest(d->req,
utf8_String(collectNewFormat_String("%s\r\n", cstr_String(&d->url))));
submit_TlsRequest(d->req);
}
iBool isFinished_GmRequest(const iGmRequest *d) {
iBool done;
iGuardMutex(&d->mutex, done = (d->state == finished_GmRequestState));
return done;
}
enum iGmStatusCode status_GmRequest(const iGmRequest *d) {
return d->code;
}
const iString *meta_GmRequest(const iGmRequest *d) {
if (d->state >= receivingBody_GmRequestState) {
return &d->header;
}
return collectNew_String();
}
const iBlock *body_GmRequest(const iGmRequest *d) {
iBlock *body;
iGuardMutex(&d->mutex, body = collect_Block(copy_Block(&d->body)));
return body;
}
const iString *url_GmRequest(const iGmRequest *d) {
return &d->url;
}
iDefineClass(GmRequest)
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