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[style] Use Dowa type aliases in C Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Tue, 04 Aug 2026 02:44:06 -0700
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children 745fd127b2a1
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1 ---
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2 name: zenbu-seobeo-networking
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3 description: Use this skill when changing or extending seobeo, the C networking layer for HTTP clients, HTTP/static servers, routing, streaming, TLS, or WebSockets.
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4 ---
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5
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6 # Seobeo Networking
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7
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8 Use this skill for the `seobeo/` networking library and any server code built on top of it.
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9
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10 ## Mental model
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11
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12 `seobeo` is the shared C networking layer. It provides:
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13
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14 - TCP server/client handles in `s_network.c`.
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15 - TLS helpers in `s_ssl.c`.
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16 - Static file and HTTP routing in `s_web.c`.
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17 - Curl-like HTTP client APIs in `s_http_client.c`.
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18 - WebSocket client/server support in `s_websocket*.c`.
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19 - Snapshot/test utilities in `snapshot_creator.c`.
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20 - Public API declarations in `seobeo/seobeo.h`.
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21 - Internal types in `seobeo/seobeo_internal.h`.
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22
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23 Prefer using public APIs from `seobeo.h` in applications. Only reach into internals when modifying seobeo itself.
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24
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25 ## Common APIs
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26
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27 HTTP client:
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28
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29 ```c
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30 Seobeo_Client_Request *p_req = Seobeo_Client_Request_Create("https://example.com/path");
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31 Seobeo_Client_Request_Set_Method(p_req, "GET");
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32 Seobeo_Client_Request_Add_Header_Array(p_req, "Accept: application/json");
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33 Seobeo_Client_Response *p_resp = Seobeo_Client_Request_Execute(p_req);
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34 Seobeo_Client_Request_Destroy(p_req);
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35 Seobeo_Client_Response_Destroy(p_resp);
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36 ```
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37
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38 HTTP routes:
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39
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40 ```c
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41 Seobeo_Router_Init();
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42 Seobeo_Router_Register("GET", "/api/example/:id", Handler);
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43 Seobeo_Web_Server_Start("site/src", "8080", SEOBEO_MODE_EDGE, 1);
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44 Seobeo_Router_Destroy();
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45 ```
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46
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47 Route handler shape:
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48
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49 ```c
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50 Seobeo_Request_Entry *Handler(Seobeo_Request_Entry *req, Dowa_Arena *arena)
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51 {
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52 Seobeo_Request_Entry *resp = NULL;
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53 Dowa_HashMap_Push_Arena(resp, "status", "200", arena);
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54 Dowa_HashMap_Push_Arena(resp, "content-type", "application/json", arena);
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55 Dowa_HashMap_Push_Arena(resp, "body", "{\"ok\":true}", arena);
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56 return resp;
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57 }
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58 ```
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59
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60 WebSocket server:
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61
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62 ```c
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63 Seobeo_WebSocket_Server_Init();
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64 Seobeo_WebSocket_Server_Register("/chat", Chat_Handler, NULL);
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65 ```
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66
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67 ## Build targets
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68
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69 Choose the smallest library variant that matches the feature:
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70
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71 - `//seobeo:seobeo_min`: TCP/SSL basics.
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72 - `//seobeo:seobeo_tcp_server`: HTTP server, no WebSocket, no SSL.
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73 - `//seobeo:seobeo_tcp_server_ws`: HTTP server with WebSocket.
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74 - `//seobeo:seobeo_tcp_client`: HTTP client.
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75 - `//seobeo:seobeo_tcp_client_ws`: HTTP client with WebSocket.
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76 - `//seobeo:seobeo`: full combined library.
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77 - `//seobeo:seobeo_debug`: full library with debug logging.
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78
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79 ## Tests
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80
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81 Run the narrowest relevant tests first:
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82
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83 ```bash
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84 bazel test //seobeo:seobeo_client_test
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85 bazel test //seobeo:seobeo_websocket_test
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86 bazel test //seobeo:seobeo_websocket_server_test
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87 ```
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88
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89 For API changes, also build downstream users:
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90
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91 ```bash
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92 bazel build //mrjunejune:mrjunejune_server //hg-web:hg_web_server
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93 ```
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94
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95 ## Safety checklist
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96
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97 - Use Dowa aliases such as `uint8`, `uint32`, and `boolean` with
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98 `TRUE`/`FALSE`; avoid adding `<stdint.h>` `_t` types or `<stdbool.h>` `bool`
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99 to first-party C when the Dowa equivalent exists.
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100 - Keep binary bodies binary-safe: use explicit lengths and `Dowa_Arena_Copy`/`memcpy`, not `strlen`, when forwarding arbitrary bytes.
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101 - Destroy `Seobeo_Client_Request`, `Seobeo_Client_Response`, `Seobeo_Handle`, and WebSocket messages on owned paths.
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102 - Do not swallow network errors. Return explicit HTTP 4xx/5xx responses or propagate error codes.
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103 - Preserve keep-alive, content-length, and response header behavior when touching routing or streaming.
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104 - Be careful with request map keys: existing code uses keys such as `Body`, `Content-Length`, `Authorization`, `HTTP_Method`, `QueryString`, route params like `:filename`, and query-derived keys like `query_path`.
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105 - For WebSockets, respect RFC 6455 requirements: client frames masked, fragmentation handled, control frames handled, and close paths cleaned up.