static int POST_auth(BlogRef const blog, SLNSessionRef const session, HTTPConnectionRef const conn, HTTPMethod const method, strarg_t const URI, HTTPHeadersRef const headers) {
if(HTTP_POST != method) return -1;
if(0 != uripathcmp("/auth", URI, NULL)) return -1;
// TODO: Check that Content-Type is application/x-www-form-urlencoded.
str_t formdata[AUTH_FORM_MAX];
ssize_t len = HTTPConnectionReadBodyStatic(conn, (byte_t *)formdata, sizeof(formdata)-1);
if(UV_EMSGSIZE == len) return 413; // Request Entity Too Large
if(len < 0) return 500;
formdata[len] = '\0';
SLNSessionCacheRef const cache = SLNRepoGetSessionCache(blog->repo);
static strarg_t const fields[] = {
"action-login",
"action-register",
"user",
"pass",
"token", // TODO: CSRF protection
};
str_t *values[numberof(fields)] = {};
QSValuesParse(formdata, values, fields, numberof(fields));
if(values[1]) {
QSValuesCleanup(values, numberof(values));
return 501; // TODO: Not Implemented
}
if(!values[0]) {
QSValuesCleanup(values, numberof(values));
return 400; // Not login?
}
SLNSessionRef s;
int rc = SLNSessionCacheCreateSession(cache, values[2], values[3], &s); // TODO
QSValuesCleanup(values, numberof(values));
if(rc < 0) {
HTTPConnectionSendRedirect(conn, 303, "/account?err=1");
return 0;
}
str_t *cookie = SLNSessionCopyCookie(s);
SLNSessionRelease(&s);
if(!cookie) return 500;
HTTPConnectionWriteResponse(conn, 303, "See Other");
HTTPConnectionWriteHeader(conn, "Location", "/");
HTTPConnectionWriteSetCookie(conn, cookie, "/", 60 * 60 * 24 * 365);
HTTPConnectionWriteContentLength(conn, 0);
HTTPConnectionBeginBody(conn);
HTTPConnectionEnd(conn);
FREE(&cookie);
return 0;
}
void SLNFilterParseOptions(strarg_t const qs, SLNFilterPosition *const start, uint64_t *const count, int *const dir, bool *const wait) {
static strarg_t const fields[] = {
"start",
"count",
"dir",
"wait",
};
str_t *values[numberof(fields)] = {};
QSValuesParse(qs, values, fields, numberof(fields));
if(start) parse_start(values[0], start);
if(count) *count = parse_count(values[1], *count);
if(dir) *dir = parse_dir(values[2], *dir);
if(wait) *wait = parse_wait(values[3]);
QSValuesCleanup(values, numberof(values));
}
static int GET_query(BlogRef const blog, SLNSessionRef const session, HTTPConnectionRef const conn, HTTPMethod const method, strarg_t const URI, HTTPHeadersRef const headers) {
if(HTTP_GET != method && HTTP_HEAD != method) return -1;
strarg_t qs = NULL;
if(0 != uripathcmp("/", URI, &qs)) return -1;
if(HTTP_HEAD == method) return 501; // TODO
// TODO: This is the most complicated function in the whole program.
// It's unbearable.
str_t *query = NULL;
str_t *query_HTMLSafe = NULL;
str_t *parsed_HTMLSafe = NULL;
SLNFilterRef filter = NULL;
int rc;
static strarg_t const fields[] = {
"q",
};
str_t *values[numberof(fields)] = {};
QSValuesParse(qs, values, fields, numberof(fields));
query = values[0]; values[0] = NULL;
query_HTMLSafe = htmlenc(values[0]);
rc = SLNUserFilterParse(session, query, &filter);
QSValuesCleanup(values, numberof(values));
if(DB_EACCES == rc) {
FREE(&query);
FREE(&query_HTMLSafe);
return 403;
}
// SLNFilterPrintSexp(filter, stderr, 0); // DEBUG
if(DB_EINVAL == rc) rc = SLNFilterCreate(session, SLNVisibleFilterType, &filter);
if(rc < 0) {
FREE(&query);
FREE(&query_HTMLSafe);
return 500;
}
str_t tmp[URI_MAX]; tmp[0] = '\0'; // fmemopen shim ignores mode.
FILE *parsed = fmemopen(tmp, sizeof(tmp), "w");
if(!parsed) {
FREE(&query);
FREE(&query_HTMLSafe);
return 500;
}
SLNFilterPrintUser(filter, parsed, 0);
fclose(parsed);
tmp[sizeof(tmp)-1] = '\0'; // fmemopen(3) says this isn't guaranteed.
parsed_HTMLSafe = htmlenc(tmp);
SLNFilterPosition pos[1] = {{ .dir = -1 }};
str_t *URIs[RESULTS_MAX];
uint64_t max = numberof(URIs);
int outdir = -1;
SLNFilterParseOptions(qs, pos, &max, &outdir, NULL);
if(max < 1) max = 1;
if(max > numberof(URIs)) max = numberof(URIs);
bool const has_start = !!pos->URI;
uint64_t const t1 = uv_hrtime();
ssize_t const count = SLNFilterCopyURIs(filter, session, pos, outdir, false, URIs, (size_t)max);
SLNFilterPositionCleanup(pos);
if(count < 0) {
FREE(&query);
FREE(&query_HTMLSafe);
FREE(&parsed_HTMLSafe);
SLNFilterFree(&filter);
if(DB_NOTFOUND == count) {
// Possibly a filter age-function bug.
alogf("Invalid start parameter? %s\n", URI);
return 500;
}
alogf("Filter error: %s\n", sln_strerror(count));
return 500;
}
SLNFilterFree(&filter);
uint64_t const t2 = uv_hrtime();
str_t *reponame_HTMLSafe = htmlenc(SLNRepoGetName(blog->repo));
snprintf(tmp, sizeof(tmp), "Queried in %.6f seconds", (t2-t1) / 1e9);
str_t *querytime_HTMLSafe = htmlenc(tmp);
str_t *account_HTMLSafe;
if(0 == SLNSessionGetUserID(session)) {
account_HTMLSafe = htmlenc("Log In");
} else {
strarg_t const user = SLNSessionGetUsername(session);
snprintf(tmp, sizeof(tmp), "Account: %s", user);
account_HTMLSafe = htmlenc(tmp);
}
// TODO: Write a real function for building query strings
// Don't use ?: GNUism
// Preserve other query parameters like `dir`
str_t *query_encoded = !query ? NULL : QSEscape(query, strlen(query), true);
FREE(&query);
str_t *firstpage_HTMLSafe = NULL;
str_t *prevpage_HTMLSafe = NULL;
str_t *nextpage_HTMLSafe = NULL;
str_t *lastpage_HTMLSafe = NULL;
snprintf(tmp, sizeof(tmp), "?q=%s&start=-", query_encoded ?: "");
firstpage_HTMLSafe = htmlenc(tmp);
str_t *p = !count ? NULL : URIs[outdir > 0 ? 0 : count-1];
str_t *n = !count ? NULL : URIs[outdir > 0 ? count-1 : 0];
if(p) p = QSEscape(p, strlen(p), 1);
if(n) n = QSEscape(n, strlen(n), 1);
snprintf(tmp, sizeof(tmp), "?q=%s&start=%s", query_encoded ?: "", p ?: "");
prevpage_HTMLSafe = htmlenc(tmp);
snprintf(tmp, sizeof(tmp), "?q=%s&start=-%s", query_encoded ?: "", n ?: "");
nextpage_HTMLSafe = htmlenc(tmp);
snprintf(tmp, sizeof(tmp), "?q=%s", query_encoded ?: "");
lastpage_HTMLSafe = htmlenc(tmp);
FREE(&query_encoded);
FREE(&p);
FREE(&n);
str_t *qs_HTMLSafe = htmlenc(qs);
TemplateStaticArg const args[] = {
{"reponame", reponame_HTMLSafe},
{"querytime", querytime_HTMLSafe},
{"account", account_HTMLSafe},
{"query", query_HTMLSafe},
{"parsed", parsed_HTMLSafe},
{"firstpage", firstpage_HTMLSafe},
{"prevpage", prevpage_HTMLSafe},
{"nextpage", nextpage_HTMLSafe},
{"lastpage", lastpage_HTMLSafe},
{"qs", qs_HTMLSafe},
{NULL, NULL},
};
if(count > 0) {
HTTPConnectionWriteResponse(conn, 200, "OK");
} else {
HTTPConnectionWriteResponse(conn, 404, "Not Found");
}
HTTPConnectionWriteHeader(conn, "Content-Type", "text/html; charset=utf-8");
HTTPConnectionWriteHeader(conn, "Transfer-Encoding", "chunked");
if(0 == SLNSessionGetUserID(session)) {
HTTPConnectionWriteHeader(conn, "Cache-Control", "no-cache, public");
} else {
HTTPConnectionWriteHeader(conn, "Cache-Control", "no-cache, private");
}
HTTPConnectionBeginBody(conn);
TemplateWriteHTTPChunk(blog->header, &TemplateStaticCBs, args, conn);
if(0 == count) {
TemplateWriteHTTPChunk(blog->noresults, &TemplateStaticCBs, args, conn);
}
for(size_t i = 0; i < count; i++) {
str_t algo[SLN_ALGO_SIZE]; // SLN_INTERNAL_ALGO
str_t hash[SLN_HASH_SIZE];
SLNParseURI(URIs[i], algo, hash);
str_t *previewPath = BlogCopyPreviewPath(blog, hash);
rc = send_preview(blog, conn, session, URIs[i], previewPath);
FREE(&previewPath);
if(rc < 0) break;
}
// TODO: HACK
// Hide the pagination buttons when there are less than one full page of results.
if(count >= max || has_start) {
TemplateWriteHTTPChunk(blog->footer, &TemplateStaticCBs, args, conn);
}
FREE(&reponame_HTMLSafe);
FREE(&querytime_HTMLSafe);
FREE(&account_HTMLSafe);
FREE(&query_HTMLSafe);
FREE(&parsed_HTMLSafe);
FREE(&firstpage_HTMLSafe);
FREE(&prevpage_HTMLSafe);
FREE(&nextpage_HTMLSafe);
FREE(&lastpage_HTMLSafe);
FREE(&qs_HTMLSafe);
HTTPConnectionWriteChunkEnd(conn);
HTTPConnectionEnd(conn);
for(size_t i = 0; i < count; i++) FREE(&URIs[i]);
assert_zeroed(URIs, count);
return 0;
}
static int GET_query(BlogRef const blog, SLNSessionRef const session, HTTPConnectionRef const conn, HTTPMethod const method, strarg_t const URI, HTTPHeadersRef const headers) {
if(HTTP_GET != method) return -1;
strarg_t qs = NULL;
if(!URIPath(URI, "/", &qs)) return -1;
// TODO: This is the most complicated function in the whole program.
// It's unbearable.
str_t *query = NULL;
str_t *query_HTMLSafe = NULL;
SLNFilterRef filter = NULL;
int rc;
static strarg_t const fields[] = {
"q",
};
str_t *values[numberof(fields)] = {};
QSValuesParse(qs, values, fields, numberof(fields));
query = values[0] ? strdup(values[0]) : NULL;
query_HTMLSafe = htmlenc(values[0]);
rc = SLNUserFilterParse(session, values[0], &filter);
QSValuesCleanup(values, numberof(values));
if(DB_EACCES == rc) {
FREE(&query);
FREE(&query_HTMLSafe);
return 403;
}
if(DB_EINVAL == rc) rc = SLNFilterCreate(session, SLNVisibleFilterType, &filter);
if(rc < 0) {
FREE(&query);
FREE(&query_HTMLSafe);
return 500;
}
str_t tmp[URI_MAX];
SLNFilterToUserFilterString(filter, tmp, sizeof(tmp), 0);
str_t *parsed_HTMLSafe = htmlenc(tmp);
str_t *primaryURI = NULL;
SLNFilterRef core = SLNFilterUnwrap(filter);
SLNFilterType const filtertype = SLNFilterGetType(core);
if(SLNURIFilterType == filtertype) {
primaryURI = strdup(SLNFilterGetStringArg(core, 0));
assert(primaryURI); // TODO
SLNFilterRef alt;
rc = SLNFilterCreate(session, SLNLinksToFilterType, &alt);
assert(rc >= 0); // TODO
SLNFilterAddStringArg(alt, primaryURI, -1);
SLNFilterFree(&filter);
filter = alt; alt = NULL;
}
core = NULL;
// SLNFilterPrint(filter, 0); // DEBUG
SLNFilterPosition pos[1] = {{ .dir = -1 }};
uint64_t max = RESULTS_MAX;
int outdir = -1;
SLNFilterParseOptions(qs, pos, &max, &outdir, NULL);
if(max < 1) max = 1;
if(max > RESULTS_MAX) max = RESULTS_MAX;
uint64_t const t1 = uv_hrtime();
str_t *URIs[RESULTS_MAX];
ssize_t const count = SLNFilterCopyURIs(filter, session, pos, outdir, false, URIs, (size_t)max);
SLNFilterPositionCleanup(pos);
if(count < 0) {
fprintf(stderr, "Filter error: %s\n", sln_strerror(count));
FREE(&query);
FREE(&query_HTMLSafe);
SLNFilterFree(&filter);
return 500;
}
SLNFilterFree(&filter);
uint64_t const t2 = uv_hrtime();
str_t *reponame_HTMLSafe = htmlenc(SLNRepoGetName(blog->repo));
snprintf(tmp, sizeof(tmp), "Queried in %.3f seconds", (t2-t1) / 1e9);
str_t *querytime_HTMLSafe = htmlenc(tmp);
str_t *account_HTMLSafe;
if(0 == SLNSessionGetUserID(session)) {
account_HTMLSafe = htmlenc("Log In");
} else {
strarg_t const user = SLNSessionGetUsername(session);
snprintf(tmp, sizeof(tmp), "Account: %s", user);
account_HTMLSafe = htmlenc(tmp);
}
// TODO: Write a real function for building query strings
// Don't use ?: GNUism
// Preserve other query parameters like `dir`
str_t *query_encoded = !query ? NULL : QSEscape(query, strlen(query), true);
FREE(&query);
str_t *firstpage_HTMLSafe = NULL;
str_t *prevpage_HTMLSafe = NULL;
str_t *nextpage_HTMLSafe = NULL;
str_t *lastpage_HTMLSafe = NULL;
snprintf(tmp, sizeof(tmp), "?q=%s&start=-", query_encoded ?: "");
firstpage_HTMLSafe = htmlenc(tmp);
str_t *p = !count ? NULL : URIs[outdir > 0 ? 0 : count-1];
str_t *n = !count ? NULL : URIs[outdir > 0 ? count-1 : 0];
if(p) p = QSEscape(p, strlen(p), 1);
if(n) n = QSEscape(n, strlen(n), 1);
snprintf(tmp, sizeof(tmp), "?q=%s&start=%s", query_encoded ?: "", p ?: "");
prevpage_HTMLSafe = htmlenc(tmp);
snprintf(tmp, sizeof(tmp), "?q=%s&start=-%s", query_encoded ?: "", n ?: "");
nextpage_HTMLSafe = htmlenc(tmp);
snprintf(tmp, sizeof(tmp), "?q=%s", query_encoded ?: "");
lastpage_HTMLSafe = htmlenc(tmp);
FREE(&query_encoded);
FREE(&p);
FREE(&n);
TemplateStaticArg const args[] = {
{"reponame", reponame_HTMLSafe},
{"querytime", querytime_HTMLSafe},
{"account", account_HTMLSafe},
{"query", query_HTMLSafe},
{"parsed", parsed_HTMLSafe},
{"firstpage", firstpage_HTMLSafe},
{"prevpage", prevpage_HTMLSafe},
{"nextpage", nextpage_HTMLSafe},
{"lastpage", lastpage_HTMLSafe},
{NULL, NULL},
};
HTTPConnectionWriteResponse(conn, 200, "OK");
HTTPConnectionWriteHeader(conn, "Content-Type", "text/html; charset=utf-8");
HTTPConnectionWriteHeader(conn, "Transfer-Encoding", "chunked");
if(0 == SLNSessionGetUserID(session)) {
HTTPConnectionWriteHeader(conn, "Cache-Control", "no-cache, public");
} else {
HTTPConnectionWriteHeader(conn, "Cache-Control", "no-cache, private");
}
HTTPConnectionBeginBody(conn);
TemplateWriteHTTPChunk(blog->header, &TemplateStaticCBs, args, conn);
if(primaryURI) {
SLNFileInfo info[1];
rc = SLNSessionGetFileInfo(session, primaryURI, info);
if(rc >= 0) {
str_t *preferredURI = SLNFormatURI(SLN_INTERNAL_ALGO, info->hash);
str_t *previewPath = BlogCopyPreviewPath(blog, info->hash);
send_preview(blog, conn, session, preferredURI, previewPath);
FREE(&preferredURI);
FREE(&previewPath);
SLNFileInfoCleanup(info);
} else if(DB_NOTFOUND == rc) {
TemplateWriteHTTPChunk(blog->notfound, &TemplateStaticCBs, args, conn);
}
if(count) {
TemplateWriteHTTPChunk(blog->backlinks, &TemplateStaticCBs, args, conn);
}
}
bool const broadest_possible_filter =
SLNVisibleFilterType == filtertype ||
SLNAllFilterType == filtertype;
if(0 == count && !primaryURI && !broadest_possible_filter) {
TemplateWriteHTTPChunk(blog->noresults, &TemplateStaticCBs, args, conn);
}
for(size_t i = 0; i < count; i++) {
str_t algo[SLN_ALGO_SIZE]; // SLN_INTERNAL_ALGO
str_t hash[SLN_HASH_SIZE];
SLNParseURI(URIs[i], algo, hash);
str_t *previewPath = BlogCopyPreviewPath(blog, hash);
rc = send_preview(blog, conn, session, URIs[i], previewPath);
FREE(&previewPath);
if(rc < 0) break;
}
FREE(&primaryURI);
TemplateWriteHTTPChunk(blog->footer, &TemplateStaticCBs, args, conn);
FREE(&reponame_HTMLSafe);
FREE(&querytime_HTMLSafe);
FREE(&account_HTMLSafe);
FREE(&query_HTMLSafe);
FREE(&parsed_HTMLSafe);
FREE(&firstpage_HTMLSafe);
FREE(&prevpage_HTMLSafe);
FREE(&nextpage_HTMLSafe);
FREE(&lastpage_HTMLSafe);
HTTPConnectionWriteChunkEnd(conn);
HTTPConnectionEnd(conn);
for(size_t i = 0; i < count; i++) FREE(&URIs[i]);
assert_zeroed(URIs, count);
return 0;
}
static void SLNFilterResultsWrite(SLNSessionRef const session, SLNFilterRef const filter, SLNFilterOpts *const opts, HTTPConnectionRef const conn) {
// TODO: Accept count and use it for the total number of results.
opts->count = 0;
// We're sending a series of batches, so reversing one batch
// doesn't make sense.
opts->outdir = opts->dir;
static strarg_t const fields[] = { "wait" };
str_t *values[numberof(fields)] = {};
QSValuesParse(qs, values, fields, numberof(fields));
bool const wait = parse_wait(values[0]);
QSValuesCleanup(values, numberof(values));
// I'm aware that we're abusing HTTP for sending real-time push data.
// I'd also like to support WebSocket at some point, but this is simpler
// and frankly probably more widely supported.
// Note that the protocol doesn't really break even if this data is
// cached. It DOES break if a proxy tries to buffer the whole response
// before passing it back to the client. I'd be curious to know whether
// such proxies still exist in 2015.
HTTPConnectionWriteResponse(conn, 200, "OK");
HTTPConnectionWriteHeader(conn, "Transfer-Encoding", "chunked");
HTTPConnectionWriteHeader(conn,
"Content-Type", "text/uri-list; charset=utf-8");
HTTPConnectionWriteHeader(conn, "Cache-Control", "no-store");
HTTPConnectionWriteHeader(conn, "Vary", "*");
HTTPConnectionBeginBody(conn);
int rc;
for(;;) {
rc = sendURIBatch(session, filter, opts, conn);
if(DB_NOTFOUND == rc) break;
if(DB_SUCCESS == rc) continue;
fprintf(stderr, "Query error: %s\n", db_strerror(rc));
goto cleanup;
}
if(!wait || opts->dir < 0) goto cleanup;
SLNRepoRef const repo = SLNSessionGetRepo(session);
for(;;) {
uint64_t const timeout = uv_now(async_loop)+(1000 * 30);
rc = SLNRepoSubmissionWait(repo, opts->sortID, timeout);
if(UV_ETIMEDOUT == rc) {
uv_buf_t const parts[] = { uv_buf_init((char *)STR_LEN("\r\n")) };
rc = HTTPConnectionWriteChunkv(conn, parts, numberof(parts));
if(rc < 0) break;
continue;
}
assert(rc >= 0); // TODO: Handle cancellation?
for(;;) {
rc = sendURIBatch(session, filter, opts, conn);
if(DB_NOTFOUND == rc) break;
if(DB_SUCCESS == rc) continue;
fprintf(stderr, "Query error: %s\n", db_strerror(rc));
goto cleanup;
}
}
cleanup:
HTTPConnectionWriteChunkEnd(conn);
HTTPConnectionEnd(conn);
SLNFilterOptsCleanup(opts);
}
