Mercurial > hg > nginx
view src/http/ngx_http_parse.c @ 4:c5f071d376e5
nginx-0.0.1-2002-08-22-19:24:03 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 22 Aug 2002 15:24:03 +0000 |
parents | d220029ac7f3 |
children | b5481d6fbbd4 |
line wrap: on
line source
#include <ngx_config.h> #include <ngx_http.h> int ngx_read_http_request_line(ngx_http_request_t *r) { char ch; char *buff = r->buff->buff; char *p = r->buff->pos; enum { rl_start = 0, rl_space_after_method, rl_spaces_before_uri, rl_after_slash_in_uri, rl_check_uri, rl_uri, rl_http_09, rl_http_version, rl_first_major_digit, rl_major_digit, rl_first_minor_digit, rl_minor_digit, rl_almost_done, rl_done } state = r->state; while (p < r->buff->last && state < rl_done) { ch = *p++; /* printf("\nstate: %d, pos: %x, end: %x, char: '%c' buf: %s", state, p, r->buff->last, ch, p); */ /* GCC complie it as jump table */ switch (state) { /* HTTP methods: GET, HEAD, POST */ case rl_start: switch (ch) { case 'G': if (p + 1 >= r->buff->last) return 0; if (*p != 'E' || *(p + 1) != 'T') return NGX_HTTP_INVALID_METHOD; r->method = NGX_HTTP_GET; p += 2; break; case 'H': if (p + 2 >= r->buff->last) return 0; if (*p != 'E' || *(p + 1) != 'A' || *(p + 2) != 'D') return NGX_HTTP_INVALID_METHOD; r->method = NGX_HTTP_HEAD; p += 3; break; case 'P': if (p + 2 >= r->buff->last) return 0; if (*p != 'O' || *(p + 1) != 'S' || *(p + 2) != 'T') return NGX_HTTP_INVALID_METHOD; r->method = NGX_HTTP_POST; p += 3; break; default: return NGX_HTTP_INVALID_METHOD; } state = rl_space_after_method; break; /* single space after method */ case rl_space_after_method: switch (ch) { case ' ': state = rl_spaces_before_uri; break; default: return NGX_HTTP_INVALID_METHOD; } break; /* space* before URI */ case rl_spaces_before_uri: switch (ch) { case '/': r->uri_start = p - 1; state = rl_after_slash_in_uri; break; case ' ': break; default: r->unusual_uri = 1; r->uri_start = p - 1; state = rl_uri; break; } break; /* check dot after slash */ case rl_after_slash_in_uri: switch (ch) { case CR: r->uri_end = p - 1; r->http_minor = 9; state = rl_almost_done; break; case LF: r->uri_end = p - 1; r->http_minor = 9; state = rl_done; break; case ' ': r->uri_end = p - 1; state = rl_http_09; break; case '.': r->complex_uri = 1; state = rl_uri; break; case '/': r->complex_uri = 1; state = rl_uri; break; case '?': r->args_start = p; state = rl_uri; break; default: state = rl_check_uri; break; } break; /* check slash in URI */ case rl_check_uri: switch (ch) { case CR: r->uri_end = p - 1; r->http_minor = 9; state = rl_almost_done; break; case LF: r->uri_end = p - 1; r->http_minor = 9; state = rl_done; break; case ' ': r->uri_end = p - 1; state = rl_http_09; break; case '.': r->uri_ext = p; break; case '/': r->uri_ext = NULL; state = rl_after_slash_in_uri; break; case '?': r->args_start = p; state = rl_uri; break; } break; /* URI */ case rl_uri: switch (ch) { case CR: r->uri_end = p - 1; r->http_minor = 9; state = rl_almost_done; break; case LF: r->uri_end = p - 1; r->http_minor = 9; state = rl_done; break; case ' ': r->uri_end = p - 1; state = rl_http_09; break; } break; /* space+ after URI */ case rl_http_09: switch (ch) { case ' ': break; case CR: r->http_minor = 9; state = rl_almost_done; break; case LF: r->http_minor = 9; state = rl_done; break; case 'H': state = rl_http_version; break; default: return NGX_HTTP_INVALID_REQUEST; } break; /* TTP/ */ case rl_http_version: if (p + 2 >= r->buff->last) { r->state = rl_http_version; r->buff->pos = p - 1; return 0; } if (ch != 'T' || *p != 'T' || *(p + 1) != 'P' || *(p + 2) != '/') return NGX_HTTP_INVALID_REQUEST; p += 3; state = rl_first_major_digit; break; /* first digit of major HTTP version */ case rl_first_major_digit: if (ch < '1' || ch > '9') return NGX_HTTP_INVALID_REQUEST; r->http_major = ch - '0'; state = rl_major_digit; break; /* major HTTP version or dot */ case rl_major_digit: if (ch == '.') { state = rl_first_minor_digit; break; } if (ch < '0' || ch > '9') return NGX_HTTP_INVALID_REQUEST; r->http_major = r->http_major * 10 + ch - '0'; break; /* first digit of minor HTTP version */ case rl_first_minor_digit: if (ch < '0' || ch > '9') return NGX_HTTP_INVALID_REQUEST; r->http_minor = ch - '0'; state = rl_minor_digit; break; /* minor HTTP version or end of request line */ case rl_minor_digit: if (ch == CR) { state = rl_almost_done; break; } if (ch == LF) { state = rl_done; break; } if (ch < '0' || ch > '9') return NGX_HTTP_INVALID_REQUEST; r->http_minor = r->http_minor * 10 + ch - '0'; break; /* end of request line */ case rl_almost_done: switch (ch) { case LF: state = rl_done; break; default: return NGX_HTTP_INVALID_METHOD; } break; } } r->buff->pos = p; if (state == rl_done) { r->http_version = r->http_major * 1000 + r->http_minor; r->state = rl_start; return 1; } else { r->state = state; return 0; } } int ngx_read_http_header_line(ngx_http_request_t *r) { char c, ch; char *buff = r->buff->buff; char *p = r->buff->pos; enum { hl_start = 0, hl_name, hl_space_before_value, hl_value, hl_space_after_value, hl_almost_done, header_almost_done, hl_done, header_done } state = r->state; while (p < r->buff->last && state < hl_done) { ch = *p++; /* printf("\nstate: %d, pos: %x, end: %x, char: '%c' buf: %s", state, p, r->buff->last, ch, p); */ switch (state) { /* first char */ case hl_start: switch (ch) { case CR: r->header_end = p - 1; state = header_almost_done; break; case LF: r->header_end = p - 1; state = header_done; break; default: state = hl_name; r->header_name_start = p - 1; c = ch | 0x20; if (c >= 'a' && c <= 'z') break; if (ch == '-') break; if (ch >= '0' && ch <= '9') break; return NGX_HTTP_INVALID_HEADER; } break; /* header name */ case hl_name: c = ch | 0x20; if (c >= 'a' && c <= 'z') break; if (ch == ':') { r->header_name_end = p - 1; state = hl_space_before_value; break; } if (ch == '-') break; if (ch >= '0' && ch <= '9') break; return NGX_HTTP_INVALID_HEADER; /* space* before header value */ case hl_space_before_value: switch (ch) { case ' ': break; case CR: r->header_start = r->header_end = p - 1; state = hl_almost_done; break; case LF: r->header_start = r->header_end = p - 1; state = hl_done; break; default: r->header_start = p - 1; state = hl_value; break; } break; /* header value */ case hl_value: switch (ch) { case ' ': r->header_end = p - 1; state = hl_space_after_value; break; case CR: r->header_end = p - 1; state = hl_almost_done; break; case LF: r->header_end = p - 1; state = hl_done; break; } break; /* space* before end of header line */ case hl_space_after_value: switch (ch) { case ' ': break; case CR: state = hl_almost_done; break; case LF: state = hl_done; break; default: state = hl_value; break; } break; /* end of header line */ case hl_almost_done: switch (ch) { case LF: state = hl_done; break; default: return NGX_HTTP_INVALID_HEADER; } break; /* end of header */ case header_almost_done: switch (ch) { case LF: state = header_done; break; default: return NGX_HTTP_INVALID_HEADER; } break; } } r->buff->pos = p; if (state == hl_done) { r->state = hl_start; return 1; } else if (state == header_done) { r->state = hl_start; return 2; } else { r->state = state; return 0; } }