/* Perform text transformations on the Mobwrite response so the client will understand it:
* 1. Add a blank line to the end of the response.
* 2. If the client has requested the Javascript output format,
* wrap the text in a JavaScript method call.
*/
static ngx_int_t
ngx_http_mobwrite_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
ngx_http_mobwrite_ctx_t *ctx;
ngx_chain_t *next, *last = NULL;
int last_buf;
ctx = (ngx_http_mobwrite_ctx_t *)ngx_http_get_module_ctx(r, ngx_http_mobwrite_module);
if ((ctx == NULL) || ((ctx->format != MOBWRITE_FMT_TXT) && (ctx->format != MOBWRITE_FMT_JS))) {
/* Not a Mobwrite request, so move on to the next output filter */
return ngx_http_next_body_filter(r, in);
}
if (ctx->format == MOBWRITE_FMT_JS) {
js_escape(in, r->pool);
}
/* Determine whether this filter chain contains the end of the response. */
last_buf = 0;
for (next = in; next != NULL; next = next->next) {
last = next;
if (next->buf->last_buf) {
last_buf = 1;
}
}
/* If we have encountered the end of the response, append a blank line.
If the client requested the JavaScript output format, generate the
closing method call syntax too. */
if (last_buf) {
ngx_str_t text = ngx_string("\n");
ngx_str_t js_text = ngx_string("\");\n");
ngx_chain_t *post;
if (ctx->format == MOBWRITE_FMT_JS) {
post = str_to_buffer_chain(js_text, r->pool);
}
else {
post = str_to_buffer_chain(text, r->pool);
}
last->buf->last_buf = 0;
post->buf->last_buf = 1;
last->next = post;
}
/* If the client requested the Javascript output format,
wrap the text in a method call */
if (!ctx->response_started) {
if (ctx->format == MOBWRITE_FMT_JS) {
ngx_str_t text = ngx_string("mobwrite.callback(\"");
ngx_chain_t *pre = str_to_buffer_chain(text, r->pool);
pre->next = in;
in = pre;
}
ctx->response_started = 1;
}
/* Pass the buffer chain on to the next filter */
return ngx_http_next_body_filter(r, in);
}
static JSBool
js_paramEscape(JSContext *cx, JSObject *obj,
uintN argc, jsval *argv, jsval *rval)
{
return js_escape(cx, obj, argc, argv, rval, URL_ESCAPE_PARAM);
}
