diff options
Diffstat (limited to '')
| -rw-r--r-- | c/wasi-http/0.2.0/env-var/Makefile | 29 | ||||
| -rw-r--r-- | c/wasi-http/0.2.0/env-var/component.c | 105 |
2 files changed, 134 insertions, 0 deletions
diff --git a/c/wasi-http/0.2.0/env-var/Makefile b/c/wasi-http/0.2.0/env-var/Makefile new file mode 100644 index 0000000..062aef4 --- /dev/null +++ b/c/wasi-http/0.2.0/env-var/Makefile @@ -0,0 +1,29 @@ +# Look for wasi-sysroot in some common places, falling back +# to provided WASI_SYSROOT +ifneq ("$(wildcard /usr/wasm32-wasi)", "") + # Fedora + WASI_SYSROOT ?= /usr/wasm32-wasi +endif + +export WASI_SYSROOT + +CC = clang +CFLAGS = -Wall -Wextra --target=wasm32-wasi --sysroot=$(WASI_SYSROOT) +LDFLAGS = -Wl,--no-entry,--export=__heap_base,--export=__data_end,--export=malloc,--export=free,--stack-first,-z,stack-size=$$((8*1024*1024)) -mexec-model=reactor --rtlib=compiler-rt + +all: component.wasm + +bindgen: + /home/andrew/src/c/wasm/git/wit-bindgen/target/release/wit-bindgen c ../../wit/wasi-http/0.2.0 --autodrop-borrows yes --world proxy + /home/andrew/src/c/wasm/git/wit-bindgen/target/release/wit-bindgen markdown ../../wit/wasi-http/0.2.0 --world proxy + +.PHONY: +module.wasm: bindgen + $(CC) $(CFLAGS) $(LDFLAGS) -o $@ proxy.c proxy_component_type.o component.c + +.PHONY: +component.wasm: module.wasm + /home/andrew/src/c/wasm/git/wasm-tools/target/release/wasm-tools component new module.wasm --adapt ../../adaptors/24.0.0/wasi_snapshot_preview1.reactor.wasm -o component.wasm + +clean: + rm -f component.wasm module.wasm proxy* diff --git a/c/wasi-http/0.2.0/env-var/component.c b/c/wasi-http/0.2.0/env-var/component.c new file mode 100644 index 0000000..1fff245 --- /dev/null +++ b/c/wasi-http/0.2.0/env-var/component.c @@ -0,0 +1,105 @@ +/* SPDX-License-Identifier: Apache-2.0 */ + +/* + * component.c - Example of writing a wasi-http Wasm component + * + * Copyright (C) Andrew Clayton + * Copyright (C) F5, Inc. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdbool.h> +#include <stdint.h> + +#include "proxy.h" + +#define ex(...) \ + do { \ + printf(__VA_ARGS__); \ + exit(EXIT_FAILURE); \ + } while (0); + +void exports_wasi_http_incoming_handler_handle( + exports_wasi_http_incoming_handler_own_incoming_request_t request, + exports_wasi_http_incoming_handler_own_response_outparam_t response_out) +{ + bool ok; + FILE *out; + size_t size; + char *out_ptr; + char clen[32]; + wasi_http_types_own_outgoing_response_t resp; + wasi_http_types_borrow_outgoing_response_t b_resp; + wasi_http_types_own_fields_t fields; + wasi_http_types_borrow_fields_t b_fields; + wasi_http_types_result_own_outgoing_response_error_code_t rerr = { }; + wasi_http_types_own_outgoing_body_t body; + wasi_http_types_borrow_outgoing_body_t b_body; + wasi_io_streams_own_output_stream_t out_stream; + wasi_io_streams_borrow_output_stream_t b_out_stream; + proxy_list_u8_t stream_data; + wasi_io_streams_stream_error_t stream_err; + wasi_http_types_header_error_t hdr_err; + wasi_http_types_field_key_t key; + wasi_http_types_field_value_t value; + proxy_list_tuple2_string_string_t env; + + (void)request; + + out = open_memstream(&out_ptr, &size); + +#define BUF_ADD(fmt, ...) \ + fprintf(out, fmt, ##__VA_ARGS__); + + BUF_ADD("*** Environment Variables ***\n\n"); + + wasi_cli_environment_get_environment(&env); + for (size_t i = 0; i < env.len; i++) + BUF_ADD("%.*s=%.*s\n", + (int)env.ptr[i].f0.len, env.ptr[i].f0.ptr, + (int)env.ptr[i].f1.len, env.ptr[i].f1.ptr); + + fclose(out); + + fields = wasi_http_types_constructor_fields(); + b_fields = wasi_http_types_borrow_fields(fields); + + proxy_string_set((proxy_string_t *)&key, "Content-Type"); + proxy_string_set((proxy_string_t *)&value, "text/plain"); + + proxy_string_set((proxy_string_t *)&key, "Content-Length"); + sprintf(clen, "%zu", size); + proxy_string_set((proxy_string_t *)&value, clen); + + ok = wasi_http_types_method_fields_append(b_fields, &key, &value, + &hdr_err); + if (!ok) + ex("wasi_http_types_method_fields_append() failed\n"); + + resp = wasi_http_types_constructor_outgoing_response(fields); + rerr.val.ok = resp; + + b_resp = wasi_http_types_borrow_outgoing_response(resp); + ok = wasi_http_types_method_outgoing_response_body(b_resp, &body); + if (!ok) + ex("wasi_http_types_method_outgoing_response_body() failed\n"); + b_body = wasi_http_types_borrow_outgoing_body(body); + + ok = wasi_http_types_method_outgoing_body_write(b_body, &out_stream); + if (!ok) + ex("wasi_http_types_method_outgoing_body_write() failed\n"); + b_out_stream = wasi_io_streams_borrow_output_stream(out_stream); + + stream_data.len = size; + stream_data.ptr = (uint8_t *)out_ptr; + ok = wasi_io_streams_method_output_stream_write(b_out_stream, + &stream_data, + &stream_err); + if (!ok) + ex("wasi_io_streams_method_output_stream_blocking_write_and_flush() failed\n"); + + wasi_http_types_static_response_outparam_set(response_out, &rerr); + + free(out_ptr); +} |