static apr_status_t xlate_in_filter(ap_filter_t *f, apr_bucket_brigade *bb, ap_input_mode_t mode, apr_read_type_e block, apr_off_t readbytes) { apr_status_t rv; charset_req_t *reqinfo = ap_get_module_config(f->r->request_config, &charset_lite_module); charset_dir_t *dc = ap_get_module_config(f->r->per_dir_config, &charset_lite_module); charset_filter_ctx_t *ctx = f->ctx; apr_size_t buffer_size; int hit_eos; if (!ctx) { /* this is SetInputFilter path; grab the preallocated context, * if any; note that if we decided not to do anything in an earlier * handler, we won't even have a reqinfo */ if (reqinfo) { ctx = f->ctx = reqinfo->input_ctx; reqinfo->input_ctx = NULL; /* prevent SNAFU if user coded us twice * in the filter chain; we can't have two * instances using the same context */ } if (!ctx) { /* no idea how to translate; don't do anything */ ctx = f->ctx = apr_pcalloc(f->r->pool, sizeof(charset_filter_ctx_t)); ctx->dc = dc; ctx->noop = 1; } } ap_log_rerror(APLOG_MARK, APLOG_TRACE6, 0, f->r, "xlate_in_filter() - " "charset_source: %s charset_default: %s", dc && dc->charset_source ? dc->charset_source : "(none)", dc && dc->charset_default ? dc->charset_default : "(none)"); if (!ctx->ran) { /* filter never ran before */ chk_filter_chain(f); ctx->ran = 1; if (!ctx->noop && !ctx->is_sb && apr_table_get(f->r->headers_in, "Content-Length")) { /* A Content-Length header is present, but it won't be valid after * conversion because we're not converting between two single-byte * charsets. This will affect most CGI scripts and may affect * some modules. * Content-Length can't be unset here because that would break * being able to read the request body. * Processing of chunked request bodies is not impacted by this * filter since the the length was not declared anyway. */ ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, f->r, "Request body length may change, resulting in " "misprocessing by some modules or scripts"); } } if (ctx->noop) { return ap_get_brigade(f->next, bb, mode, block, readbytes); } if (APR_BRIGADE_EMPTY(ctx->bb)) { if ((rv = ap_get_brigade(f->next, bb, mode, block, readbytes)) != APR_SUCCESS) { return rv; } } else { APR_BRIGADE_PREPEND(bb, ctx->bb); /* first use the leftovers */ } buffer_size = INPUT_XLATE_BUF_SIZE; rv = xlate_brigade(ctx, bb, ctx->tmp, &buffer_size, &hit_eos); if (rv == APR_SUCCESS) { if (!hit_eos) { /* move anything leftover into our context for next time; * we don't currently "set aside" since the data came from * down below, but I suspect that for long-term we need to * do that */ APR_BRIGADE_CONCAT(ctx->bb, bb); } if (buffer_size < INPUT_XLATE_BUF_SIZE) { /* do we have output? */ apr_bucket *e; e = apr_bucket_heap_create(ctx->tmp, INPUT_XLATE_BUF_SIZE - buffer_size, NULL, f->r->connection->bucket_alloc); /* make sure we insert at the head, because there may be * an eos bucket already there, and the eos bucket should * come after the data */ APR_BRIGADE_INSERT_HEAD(bb, e); } else { /* XXX need to get some more data... what if the last brigade * we got had only the first byte of a multibyte char? we need * to grab more data from the network instead of returning an * empty brigade */ } /* If we have any metadata at the head of ctx->bb, go ahead and move it * onto the end of bb to be returned to our caller. */ if (!APR_BRIGADE_EMPTY(ctx->bb)) { apr_bucket *b = APR_BRIGADE_FIRST(ctx->bb); while (b != APR_BRIGADE_SENTINEL(ctx->bb) && APR_BUCKET_IS_METADATA(b)) { APR_BUCKET_REMOVE(b); APR_BRIGADE_INSERT_TAIL(bb, b); b = APR_BRIGADE_FIRST(ctx->bb); } } } else { log_xlate_error(f, rv); } return rv; }
static int xlate_in_filter(ap_filter_t *f, apr_bucket_brigade *bb, ap_input_mode_t mode, apr_read_type_e block, apr_off_t readbytes) { apr_status_t rv; charset_req_t *reqinfo = ap_get_module_config(f->r->request_config, &charset_lite_module); charset_dir_t *dc = ap_get_module_config(f->r->per_dir_config, &charset_lite_module); charset_filter_ctx_t *ctx = f->ctx; apr_size_t buffer_size; int hit_eos; if (!ctx) { /* this is SetInputFilter path; grab the preallocated context, * if any; note that if we decided not to do anything in an earlier * handler, we won't even have a reqinfo */ if (reqinfo) { ctx = f->ctx = reqinfo->input_ctx; reqinfo->input_ctx = NULL; /* prevent SNAFU if user coded us twice * in the filter chain; we can't have two * instances using the same context */ } if (!ctx) { /* no idea how to translate; don't do anything */ ctx = f->ctx = apr_pcalloc(f->r->pool, sizeof(charset_filter_ctx_t)); ctx->dc = dc; ctx->noop = 1; } } if (dc->debug >= DBGLVL_GORY) { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, f->r, "xlate_in_filter() - " "charset_source: %s charset_default: %s", dc && dc->charset_source ? dc->charset_source : "(none)", dc && dc->charset_default ? dc->charset_default : "(none)"); } if (!ctx->ran) { /* filter never ran before */ chk_filter_chain(f); ctx->ran = 1; } if (ctx->noop) { return ap_get_brigade(f->next, bb, mode, block, readbytes); } if (APR_BRIGADE_EMPTY(ctx->bb)) { if ((rv = ap_get_brigade(f->next, bb, mode, block, readbytes)) != APR_SUCCESS) { return rv; } } else { APR_BRIGADE_PREPEND(bb, ctx->bb); /* first use the leftovers */ } buffer_size = INPUT_XLATE_BUF_SIZE; rv = xlate_brigade(ctx, bb, ctx->tmp, &buffer_size, &hit_eos); if (rv == APR_SUCCESS) { if (!hit_eos) { /* move anything leftover into our context for next time; * we don't currently "set aside" since the data came from * down below, but I suspect that for long-term we need to * do that */ APR_BRIGADE_CONCAT(ctx->bb, bb); } if (buffer_size < INPUT_XLATE_BUF_SIZE) { /* do we have output? */ apr_bucket *e; e = apr_bucket_heap_create(ctx->tmp, INPUT_XLATE_BUF_SIZE - buffer_size, NULL, f->r->connection->bucket_alloc); /* make sure we insert at the head, because there may be * an eos bucket already there, and the eos bucket should * come after the data */ APR_BRIGADE_INSERT_HEAD(bb, e); } else { /* XXX need to get some more data... what if the last brigade * we got had only the first byte of a multibyte char? we need * to grab more data from the network instead of returning an * empty brigade */ } } else { log_xlate_error(f, rv); } return rv; }