static int parse_file(BlogRef const blog,
SLNSessionRef const session,
MultipartFormRef const form,
SLNSubmissionRef *const outfile,
SLNSubmissionRef *const outmeta,
str_t **const outname)
{
assert(form);
SLNSubmissionRef file = NULL;
SLNSubmissionRef meta = NULL;
SLNFileInfo src[1] = {};
str_t *htmlpath = NULL;
int rc = 0;
strarg_t const fields[] = {
"content-type",
"content-disposition",
};
char content_type[100];
char content_disposition[1024];
uv_buf_t values[] = {
uv_buf_init(BUF_LEN(content_type)),
uv_buf_init(BUF_LEN(content_disposition)),
};
assert(numberof(fields) == numberof(values));
rc = MultipartFormReadHeadersStatic(form, values, fields, numberof(values));
if(rc < 0) goto cleanup;
strarg_t type;
if(0 == strcmp("form-data; name=\"markdown\"", content_disposition)) {
type = "text/markdown; charset=utf-8";
} else {
type = content_type;
static strarg_t const f[] = { "filename", "filename*" };
str_t *v[numberof(f)] = {};
ContentDispositionParse(content_disposition, NULL, v, f, numberof(f));
if(v[1]) {
*outname = v[1]; v[1] = NULL;
} else {
*outname = v[0]; v[0] = NULL;
}
for(size_t i = 0; i < numberof(v); i++) FREE(&v[i]);
}
rc = SLNSubmissionCreate(session, NULL, &file);
if(rc < 0) goto cleanup;
rc = SLNSubmissionSetType(file, type);
if(rc < 0) goto cleanup;
for(;;) {
uv_buf_t buf[1];
rc = MultipartFormReadData(form, buf);
if(rc < 0) goto cleanup;
if(0 == buf->len) break;
rc = SLNSubmissionWrite(file, (byte_t const *)buf->base, buf->len);
if(rc < 0) goto cleanup;
}
rc = SLNSubmissionEnd(file);
if(rc < 0) goto cleanup;
rc = SLNSubmissionGetFileInfo(file, src);
if(rc < 0) goto cleanup;
htmlpath = BlogCopyPreviewPath(blog, src->hash);
if(!htmlpath) rc = UV_ENOMEM;
if(rc < 0) goto cleanup;
strarg_t const URI = SLNSubmissionGetPrimaryURI(file);
(void)BlogConvert(blog, session, htmlpath, &meta, URI, src);
// We don't actually care about failure here?
// Even if no preview and no meta-file can be generated, that's fine.
*outfile = file; file = NULL;
*outmeta = meta; meta = NULL;
cleanup:
SLNSubmissionFree(&file);
SLNSubmissionFree(&meta);
SLNFileInfoCleanup(src);
FREE(&htmlpath);
return rc;
}
/*static int POST_auth(SLNRepoRef const repo, SLNSessionRef const session, HTTPConnectionRef const conn, HTTPMethod const method, strarg_t const URI, HTTPHeadersRef const headers) {
if(HTTP_POST != method) return -1;
if(!URIPath(URI, "/sln/auth", NULL)) return -1;
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(repo);
static strarg_t const fields[] = {
"user",
"pass",
"token", // TODO: CSRF protection
};
str_t *values[numberof(fields)] = {};
QSValuesParse(formdata, values, fields, numberof(fields));
SLNSessionRef s;
int rc = SLNSessionCacheCreateSession(cache, values[0], values[1], &s);
QSValuesCleanup(values, numberof(values));
if(rc < 0) return 403;
str_t *cookie = SLNSessionCopyCookie(s);
SLNSessionRelease(&s);
if(!cookie) return 500;
HTTPConnectionWriteResponse(conn, 200, "OK");
HTTPConnectionWriteSetCookie(conn, cookie, "/", 60 * 60 * 24 * 365);
HTTPConnectionWriteContentLength(conn, 0);
HTTPConnectionBeginBody(conn);
HTTPConnectionEnd(conn);
FREE(&cookie);
return 0;
}*/
static int GET_file(SLNRepoRef const repo, 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;
int len = 0;
str_t algo[SLN_ALGO_SIZE];
str_t hash[SLN_HASH_SIZE];
algo[0] = '\0';
hash[0] = '\0';
sscanf(URI, "/sln/file/" SLN_ALGO_FMT "/" SLN_HASH_FMT "%n", algo, hash, &len);
if(!algo[0] || !hash[0]) return -1;
if('\0' != URI[len] && '?' != URI[len]) return -1;
// TODO: Check for conditional get headers and return 304 Not Modified.
str_t fileURI[SLN_URI_MAX];
int rc = snprintf(fileURI, sizeof(fileURI), "hash://%s/%s", algo, hash);
if(rc < 0 || rc >= sizeof(fileURI)) return 500;
SLNFileInfo info[1];
rc = SLNSessionGetFileInfo(session, fileURI, info);
if(DB_EACCES == rc) return 403;
if(DB_NOTFOUND == rc) return 404;
if(rc < 0) return 500;
uv_file file = async_fs_open(info->path, O_RDONLY, 0000);
if(UV_ENOENT == file) {
SLNFileInfoCleanup(info);
return 410; // Gone
}
if(file < 0) {
SLNFileInfoCleanup(info);
return 500;
}
// TODO: Hosting untrusted data is really hard.
// The same origin policy isn't doing us any favors, because most
// simple installations won't have a second domain to use.
// - For loopback, we can use an alternate loopback IP, but that
// still only covers a limited range of use cases.
// - We would really like suborigins, if they're ever widely supported.
// <http://www.chromium.org/developers/design-documents/per-page-suborigins>
// - We could report untrusted types as "text/plain" or
// "application/binary", which would be inconvenient but
// very reliable.
// TODO: Use Content-Disposition to suggest a filename, for file types
// that aren't useful to view inline.
HTTPConnectionWriteResponse(conn, 200, "OK");
HTTPConnectionWriteContentLength(conn, info->size);
HTTPConnectionWriteHeader(conn, "Content-Type", info->type);
HTTPConnectionWriteHeader(conn, "Cache-Control", "max-age=31536000");
HTTPConnectionWriteHeader(conn, "ETag", "1");
// HTTPConnectionWriteHeader(conn, "Accept-Ranges", "bytes"); // TODO
HTTPConnectionWriteHeader(conn, "Content-Security-Policy", "'none'");
HTTPConnectionWriteHeader(conn, "X-Content-Type-Options", "nosniff");
// HTTPConnectionWriteHeader(conn, "Vary", "Accept, Accept-Ranges");
// TODO: Double check Vary header syntax.
// Also do we need to change the ETag?
HTTPConnectionBeginBody(conn);
if(HTTP_HEAD != method) {
HTTPConnectionWriteFile(conn, file);
}
HTTPConnectionEnd(conn);
SLNFileInfoCleanup(info);
async_fs_close(file);
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(0 != uripathcmp("/", 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;
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;
}
if(DB_EINVAL == rc) rc = SLNFilterCreate(session, SLNVisibleFilterType, &filter);
if(rc < 0) {
FREE(&query);
FREE(&query_HTMLSafe);
return 500;
}
str_t tmp[URI_MAX];
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);
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;
bool const has_start = !!pos->URI;
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) {
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},
};
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 || has_start) {
TemplateWriteHTTPChunk(blog->backlinks, &TemplateStaticCBs, args, conn);
}
}
if(0 == count && (!primaryURI || has_start)) {
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);
FREE(&qs_HTMLSafe);
HTTPConnectionWriteChunkEnd(conn);
HTTPConnectionEnd(conn);
for(size_t i = 0; i < count; i++) FREE(&URIs[i]);
assert_zeroed(URIs, count);
return 0;
}
