#ifndef HEADER_CURL_MIME_H #define HEADER_CURL_MIME_H /*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.haxx.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ #define MIME_RAND_BOUNDARY_CHARS 16 /* Nb. of random boundary chars. */ #define MAX_ENCODED_LINE_LENGTH 76 /* Maximum encoded line length. */ #define ENCODING_BUFFER_SIZE 256 /* Encoding temp buffers size. */ /* Part flags. */ #define MIME_USERHEADERS_OWNER (1 << 0) #define MIME_BODY_ONLY (1 << 1) #define FILE_CONTENTTYPE_DEFAULT "application/octet-stream" #define MULTIPART_CONTENTTYPE_DEFAULT "multipart/mixed" #define DISPOSITION_DEFAULT "attachment" /* Part source kinds. */ enum mimekind { MIMEKIND_NONE = 0, /* Part not set. */ MIMEKIND_DATA, /* Allocated mime data. */ MIMEKIND_FILE, /* Data from file. */ MIMEKIND_CALLBACK, /* Data from `read' callback. */ MIMEKIND_MULTIPART, /* Data is a mime subpart. */ MIMEKIND_LAST }; /* Readback state tokens. */ enum mimestate { MIMESTATE_BEGIN, /* Readback has not yet started. */ MIMESTATE_CURLHEADERS, /* In curl-generated headers. */ MIMESTATE_USERHEADERS, /* In caller's supplied headers. */ MIMESTATE_EOH, /* End of headers. */ MIMESTATE_BODY, /* Placeholder. */ MIMESTATE_BOUNDARY1, /* In boundary prefix. */ MIMESTATE_BOUNDARY2, /* In boundary. */ MIMESTATE_CONTENT, /* In content. */ MIMESTATE_END, /* End of part reached. */ MIMESTATE_LAST }; /* Mime headers strategies. */ enum mimestrategy { MIMESTRATEGY_MAIL, /* Mime mail. */ MIMESTRATEGY_FORM, /* HTTP post form. */ MIMESTRATEGY_LAST }; /* Content transfer encoder. */ typedef struct { const char * name; /* Encoding name. */ size_t (*encodefunc)(char *buffer, size_t size, bool ateof, curl_mimepart *part); /* Encoded read. */ curl_off_t (*sizefunc)(curl_mimepart *part); /* Encoded size. */ } mime_encoder; /* Content transfer encoder state. */ typedef struct { size_t pos; /* Position on output line. */ size_t bufbeg; /* Next data index in input buffer. */ size_t bufend; /* First unused byte index in input buffer. */ char buf[ENCODING_BUFFER_SIZE]; /* Input buffer. */ } mime_encoder_state; /* Mime readback state. */ typedef struct { enum mimestate state; /* Current state token. */ void *ptr; /* State-dependent pointer. */ size_t offset; /* State-dependent offset. */ } mime_state; /* minimum buffer size for the boundary string */ #define MIME_BOUNDARY_LEN (24 + MIME_RAND_BOUNDARY_CHARS + 1) /* A mime multipart. */ struct curl_mime_s { struct Curl_easy *easy; /* The associated easy handle. */ curl_mimepart *parent; /* Parent part. */ curl_mimepart *firstpart; /* First part. */ curl_mimepart *lastpart; /* Last part. */ char boundary[MIME_BOUNDARY_LEN]; /* The part boundary. */ mime_state state; /* Current readback state. */ }; /* A mime part. */ struct curl_mimepart_s { struct Curl_easy *easy; /* The associated easy handle. */ curl_mime *parent; /* Parent mime structure. */ curl_mimepart *nextpart; /* Forward linked list. */ enum mimekind kind; /* The part kind. */ char *data; /* Memory data or file name. */ curl_read_callback readfunc; /* Read function. */ curl_seek_callback seekfunc; /* Seek function. */ curl_free_callback freefunc; /* Argument free function. */ void *arg; /* Argument to callback functions. */ FILE *fp; /* File pointer. */ struct curl_slist *curlheaders; /* Part headers. */ struct curl_slist *userheaders; /* Part headers. */ char *mimetype; /* Part mime type. */ char *filename; /* Remote file name. */ char *name; /* Data name. */ curl_off_t datasize; /* Expected data size. */ unsigned int flags; /* Flags. */ mime_state state; /* Current readback state. */ const mime_encoder *encoder; /* Content data encoder. */ mime_encoder_state encstate; /* Data encoder state. */ }; /* Prototypes. */ void Curl_mime_initpart(curl_mimepart *part, struct Curl_easy *easy); void Curl_mime_cleanpart(curl_mimepart *part); CURLcode Curl_mime_duppart(curl_mimepart *dst, const curl_mimepart *src); CURLcode Curl_mime_set_subparts(curl_mimepart *part, curl_mime *subparts, int take_ownership); CURLcode Curl_mime_prepare_headers(curl_mimepart *part, const char *contenttype, const char *disposition, enum mimestrategy strategy); curl_off_t Curl_mime_size(curl_mimepart *part); size_t Curl_mime_read(char *buffer, size_t size, size_t nitems, void *instream); CURLcode Curl_mime_rewind(curl_mimepart *part); CURLcode Curl_mime_add_header(struct curl_slist **slp, const char *fmt, ...); const char *Curl_mime_contenttype(const char *filename); #endif /* HEADER_CURL_MIME_H */