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#include "xtools.h"

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Macros
#define	MIME_CONTENT_LINE "Content-"

#define	MIME_CONTENTTYPE_LINE "Content-Type"

#define	MIME_CONTENTDSPO_LINE "Content-Disposition"

#define	MIME_NAMEEQ_LINE "name="

#define	MIME_FILENAMEEQ_LINE "filename="

#define	MIME_FILENAMESTAR_LINE "filename*"

#define	MIME_BOUNDARY_LINE "boundary="

#define	MIME_ISO2022JP_LINE "ISO-2022-JP"

#define	MIME_BASE64 "=?ISO-2022-JP?B?"

#define	MIME_QUTDPRNTBL ""

#define	MIME_RFC2231 "iso-2022-jp'ja'"

#define	MIME_CHARSET_ISO2022JP "Content-Type: text/plain; charset=iso-2022-jp"

#define	MIME_ERR_ENCODE -1

#define	MIME_UNKNOWN_ENCODE 0

#define	MIME_BASE64_ENCODE 1

#define	MIME_QUTDPRNTBL_ENCODE 2

#define	MIME_URL_ENCODE 3

Functions
char *	get_mime_boundary (tList *list)

tList *	get_mime_filename (FILE fp, char bndry)

tList *	get_mime_filenameffn (char fn, char bndry)

char *	decode_mime_string (char *str)

char *	decode_mime_rfc2047 (char *str)

char *	decode_mime_rfc2231 (char *str)

char *	encode_mime_string (char *str, int kind)

int	get_mime_enckind (char *str)

Detailed Description

Author: Fumi.Iseki (C)

Date: 2005 12/25

Definition in file mime_tool.h.

Macro Definition Documentation

◆ MIME_BASE64

#define MIME_BASE64 "=?ISO-2022-JP?B?"

Definition at line 21 of file mime_tool.h.

◆ MIME_BASE64_ENCODE

#define MIME_BASE64_ENCODE 1

Definition at line 28 of file mime_tool.h.

◆ MIME_BOUNDARY_LINE

#define MIME_BOUNDARY_LINE "boundary="

Definition at line 19 of file mime_tool.h.

◆ MIME_CHARSET_ISO2022JP

#define MIME_CHARSET_ISO2022JP "Content-Type: text/plain; charset=iso-2022-jp"

Definition at line 24 of file mime_tool.h.

◆ MIME_CONTENT_LINE

#define MIME_CONTENT_LINE "Content-"

Definition at line 13 of file mime_tool.h.

◆ MIME_CONTENTDSPO_LINE

#define MIME_CONTENTDSPO_LINE "Content-Disposition"

Definition at line 15 of file mime_tool.h.

◆ MIME_CONTENTTYPE_LINE

#define MIME_CONTENTTYPE_LINE "Content-Type"

Definition at line 14 of file mime_tool.h.

◆ MIME_ERR_ENCODE

#define MIME_ERR_ENCODE -1

Definition at line 26 of file mime_tool.h.

◆ MIME_FILENAMEEQ_LINE

#define MIME_FILENAMEEQ_LINE "filename="

Definition at line 17 of file mime_tool.h.

◆ MIME_FILENAMESTAR_LINE

#define MIME_FILENAMESTAR_LINE "filename*"

Definition at line 18 of file mime_tool.h.

◆ MIME_ISO2022JP_LINE

#define MIME_ISO2022JP_LINE "ISO-2022-JP"

Definition at line 20 of file mime_tool.h.

◆ MIME_NAMEEQ_LINE

#define MIME_NAMEEQ_LINE "name="

Definition at line 16 of file mime_tool.h.

◆ MIME_QUTDPRNTBL

#define MIME_QUTDPRNTBL ""

Definition at line 22 of file mime_tool.h.

◆ MIME_QUTDPRNTBL_ENCODE

#define MIME_QUTDPRNTBL_ENCODE 2

Definition at line 29 of file mime_tool.h.

◆ MIME_RFC2231

#define MIME_RFC2231 "iso-2022-jp'ja'"

Definition at line 23 of file mime_tool.h.

◆ MIME_UNKNOWN_ENCODE

#define MIME_UNKNOWN_ENCODE 0

Definition at line 27 of file mime_tool.h.

◆ MIME_URL_ENCODE

#define MIME_URL_ENCODE 3

Definition at line 30 of file mime_tool.h.

Function Documentation

◆ decode_mime_rfc2047()

char* decode_mime_rfc2047 ( char * mime )

char* decode_mime_rfc2047(char* mime)

RFC2047で定義された文字列をデコードする．文字列全体が，" " で括られていても可．

文字列中には余分な空白は無く，行間はCR+LF（またはLF）で区切られているものとする．エンコードされていない文字列が混在してもデコード可．

Parameters

mime	デコードされる文字列．

Returns: デコードされた文字列．

Definition at line 181 of file mime_tool.c.

 {
     char* buf;
     char* ppb;
     char* dec;
     char* ppd;
     char* str;
     char* ret;
     int   i, j, len, decf=0, sz;
     
     if (mime==NULL) return NULL;
  
     buf = ppb = (char*)malloc(strlen((const char*)mime)+1);
     if (buf==NULL) return NULL;
     memcpy(buf, mime, strlen(mime));
     buf[strlen(mime)] = '\0';
  
     dec = ppd = (char*)malloc(strlen((const char*)mime)+1);
     if (dec==NULL) {
         free(buf);
         return NULL;
     }
     memset(dec, 0, strlen((const char*)mime)+1);
  
     if (ppb[0]=='"') ppb++;
     i = 0;
     while(ppb[i]!='\0' && ppb[i]!='"') i++;
     ppb[i] = '\0';
  
     while (ppb[0]!='\0') {
         str = awk(ppb, '?', 1);
         len = strlen((const char*)str);
         if (str[len-1]=='=') {  // エンコードの開始地点  =?
             len--;
             str[len] = '\0';
             for (i=0, j=0; i<len; i++) {
                 if (str[i]!=CHAR_CR && str[i]!=CHAR_LF) ppd[j++] = str[i];
             }
             ppd += j;
             ppb += len + 2;
             
             free(str);
             str = awk(ppb, '?', 1);
             if (str==NULL) {
                 free(dec);
                 free(buf);
                 return NULL;
             }
             if (strcasecmp(MIME_ISO2022JP_LINE, str)) {
                 free(str);
                 free(dec);
                 free(buf);
                 return NULL;
             }
             ppb += strlen(MIME_ISO2022JP_LINE) + 1;
  
             i++;
             free(str);
             str = awk(ppb, '?', 1);
             if (str==NULL) {
                 free(dec);
                 free(buf);
                 return NULL;
             }
             if (!strcasecmp("B", str))      decf = 1;   // Base64
             else if (!strcasecmp("Q", str)) decf = 2;   // Quoted Printable
             else {
                 free(str);
                 free(dec);
                 free(buf);
                 return NULL;
             }
             ppb += 2;
  
             i++;
             free(str);
             str = awk(ppb, '?', 1);
             if (str==NULL) {
                 free(dec);
                 free(buf);
                 return NULL;
             }
             len = strlen((const char*)str);
             if (ppb[len+1]!='=') {      // エンコード終了地点でない  ?=
                 free(str);
                 free(dec);
                 free(buf);
                 return NULL;
             }
             ppb += len + 2;
  
             ret = NULL;
             if (decf==1)      ret = (char*)decode_base64((unsigned char*)str, &sz);
             else if (decf==2) ret = (char*)decode_quoted_printable((unsigned char*)str, &sz);
             if (ret==NULL) {
                 free(str);
                 free(dec);
                 free(buf);
                 return NULL;
             }
             memcpy(ppd, ret, sz);
             ppd += sz;
  
             free(str);
             free(ret);
             decf = 0;
         }
         else {
             if (len==0) break;
             for (i=0, j=0; i<len; i++) {
                 if (str[i]!=CHAR_CR && str[i]!=CHAR_LF) ppd[j++] = str[i];
             }
             ppd += j;
             ppb += len;
         }
     }
     return dec;
 }

References awk(), buf, CHAR_CR, CHAR_LF, decode_base64(), decode_quoted_printable(), len, and MIME_ISO2022JP_LINE.

Referenced by decode_mime_string().

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◆ decode_mime_rfc2231()

char* decode_mime_rfc2231 ( char * mime )

char* decode_mime_rfc2231(char* mime)

mime の内容を MIME + RFC2231 としてデコードする．

mimeには余分な空白，ダブルクォーテーションは無く，行間は ;+CR+LF（またはCR+LF，またはLF）で区切られているものとする．つまり，mime は filename*#*= 以下の部分に相当．

Parameters

mime	デコードされる文字列．

Returns: デコードされた文字列．

Definition at line 312 of file mime_tool.c.

 {
     char* buf;
     char* dec;
     int   i, j, sz;
     
     if (mime==NULL) return NULL;
  
     buf = awk(mime, '\'', 1);
     if (buf==NULL) return NULL;
     if (strcasecmp(MIME_ISO2022JP_LINE, buf)) {
         free(buf);
         return NULL;
     }
     mime += strlen(MIME_ISO2022JP_LINE) + 1;
     free(buf);
  
     buf = awk(mime, '\'', 1);
     if (buf==NULL) return NULL;
     if (strcasecmp("JA", buf)) {
         return NULL;
     }
     mime += strlen("JA") + 1;
     free(buf);
  
     buf = (char*)malloc(strlen((const char*)mime)+1);
     if (buf==NULL) return NULL;
     memset(buf, 0, strlen((const char*)mime)+1);
  
     i = j = 0;
     while(mime[i]!='\0') {
         if (mime[i]!=' ' && mime[i]!=';' && mime[i]!=CHAR_CR && mime[i]!=CHAR_LF) buf[j++] = mime[i];
         i++;
     }
  
     dec = (char*)decode_urlenc((unsigned char*)buf, &sz);
     if (dec!=NULL) dec[sz] = '\0';
     free(buf);
  
     return dec;
 }

References awk(), buf, CHAR_CR, CHAR_LF, decode_urlenc(), and MIME_ISO2022JP_LINE.

Referenced by decode_mime_string().

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◆ decode_mime_string()

char* decode_mime_string ( char * mime )

char* decode_mime_string(char* mime)

MIME文字列をデコードする．文字列が " で括られている場合は " を削除する．また，文字列中の CR, LF は無視する．

Definition at line 361 of file mime_tool.c.

 {
     int   kind; 
     char* buf=NULL;
  
     kind = get_mime_enckind(mime);
     if (kind==MIME_ERR_ENCODE) return NULL;
  
     if (kind==MIME_UNKNOWN_ENCODE) {
         int   i, j, len;
         char* str;
  
         len = strlen((const char*)mime);
         str = (char*)malloc(len+1);
         if (str==NULL) return NULL;
         memset(str, 0, len+1);
  
         i = j = 0;
         while(mime[i]!='\0') {
             if (mime[i]!=CHAR_CR && mime[i]!=CHAR_LF) str[j++] = mime[i];
             i++;
         }
         str[j] = '\0';
  
         len = strlen(str);
         buf = (char*)malloc(len+1);
         if (buf==NULL) {
             free(str);
             return NULL;
         }
         memset(buf, 0, len+1);
  
         if (str[0]=='\"' && str[len-1]=='\"' && str[len-2]!='\\') {
             memcpy(buf, str+1, len-2);
             buf[len-2] = '\0';
         }
         else {
             memcpy(buf, str, len);
             buf[len] = '\0';
         }
         free(str);
     }
     //
     else if (kind==MIME_BASE64_ENCODE || kind==MIME_QUTDPRNTBL_ENCODE) {
         buf = decode_mime_rfc2047(mime);
     }
     //
     else if (kind==MIME_URL_ENCODE) {
         int   i, j;
         char* str;
  
         str = (char*)malloc(strlen(mime)+1);
         if (str!=NULL) {
             memset(str, 0, strlen(mime)+1); 
             i = j = 0;  
             while(mime[i]!='\0') {
                 str[j++] = mime[i];
                 if (mime[i]==CHAR_LF) {
                     while(mime[i]!='\0' && mime[i]!='=') i++;       
                     if (mime[i]=='=') i++;
                 }
                 else i++;
             }
             buf = decode_mime_rfc2231(str);
             free(str);
         }
     }
     return buf;
 }

References buf, CHAR_CR, CHAR_LF, decode_mime_rfc2047(), decode_mime_rfc2231(), get_mime_enckind(), len, MIME_BASE64_ENCODE, MIME_ERR_ENCODE, MIME_QUTDPRNTBL_ENCODE, MIME_UNKNOWN_ENCODE, and MIME_URL_ENCODE.

Referenced by get_mime_filename().

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◆ encode_mime_string()

char* encode_mime_string	(	char *	str,
		int	kind
	)

char* encode_mime_string(char* str, int kind)

MIME でエンコードする（一行分のみ）．

Parameters

str	エンコードする文字データ．
kind	MIME_BASE64_ENCODE MIME + BASE64
kind	MIME_QUTDPRNTBL_ENCODE MIME + quoted printable
kind	MIME_URL_ENCODE RFC2231 (URL encode)

Returns: エンコードされた文字列．要 free

Definition at line 444 of file mime_tool.c.

 {
     char*   buf;
     Buffer  mime;
  
     mime = make_Buffer(LBUF);
     if (mime.buf==NULL) return NULL;
  
     if (kind==MIME_BASE64_ENCODE) {
         buf = (char*)encode_base64((unsigned char*)str, -1);
         if (buf==NULL) {
             free_Buffer(&mime);
             return NULL;
         }
         copy_s2Buffer(MIME_BASE64, &mime);
         cat_s2Buffer(buf, &mime);
         cat_s2Buffer("?=", &mime);
         free(buf);
     }
     //
     else if (kind==MIME_QUTDPRNTBL_ENCODE) {
         buf = (char*)encode_quoted_printable((unsigned char*)str, -1);
         if (buf==NULL) {
             free_Buffer(&mime);
             return NULL;
         }
         copy_s2Buffer(MIME_QUTDPRNTBL, &mime);
         cat_s2Buffer(buf, &mime);
         cat_s2Buffer("?=", &mime);
         free(buf);
     }
     //
     else if (kind==MIME_URL_ENCODE) {
         buf = (char*)encode_urlenc((unsigned char*)str, -1);
         if (buf==NULL) {
             free_Buffer(&mime);
             return NULL;
         }
         copy_s2Buffer(MIME_RFC2231, &mime);
         cat_s2Buffer(buf, &mime);
         free(buf);
     }
     //
     else {
         copy_s2Buffer(str, &mime);
     }
  
     return (char*)mime.buf;
 }

References buf, Buffer::buf, cat_s2Buffer, copy_s2Buffer, encode_base64(), encode_quoted_printable(), encode_urlenc(), free_Buffer(), LBUF, make_Buffer(), MIME_BASE64, MIME_BASE64_ENCODE, MIME_QUTDPRNTBL, MIME_QUTDPRNTBL_ENCODE, MIME_RFC2231, and MIME_URL_ENCODE.

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◆ get_mime_boundary()

char* get_mime_boundary ( tList * list )

char* get_mime_boundary(tList* list)

ヘッダリスト list から mime boundary を探し出す．

mime boundary 自身は先頭に '--' が付加されて返される．

Parameters

list ヘッダリスト

Returns: '––' + MIME Boundary

Definition at line 27 of file mime_tool.c.

 {
     int    i;
     char*  str;
     char*  pp;
     Buffer buf;
  
     buf = search_protocol_header_value(list, (char*)MIME_CONTENTTYPE_LINE, (char*)MIME_BOUNDARY_LINE, 1);
     if (buf.buf==NULL) return NULL;
     pp = (char*)buf.buf;
  
     pp += strlen(MIME_BOUNDARY_LINE);
     if (*pp=='\"') pp++;
  
     str = (char*)malloc(strlen((const char*)pp)+3);
     memset(str, 0, strlen((const char*)pp)+3);
     str[0] = '-';
     str[1] = '-';
     strncpy(str+2, pp, strlen((const char*)pp));
  
     i = 2;
     while (str[i]!='\0' && str[i]!='\"') i++;
     str[i] = '\0';
  
     free_Buffer(&buf);
     return str;
 }

References buf, free_Buffer(), MIME_BOUNDARY_LINE, MIME_CONTENTTYPE_LINE, and search_protocol_header_value().

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◆ get_mime_enckind()

int get_mime_enckind ( char * mime )

int get_mime_enckind(char* mime)

MIME文字列からエンコードの種類を獲得する．文字列は " " で括られていても可．

文字列の間には余分な空白は無く，行間は（存在すれば）CR+LF（またはLF）で区切られているものとする．

Parameters

mime 検査される文字列．

Returns: エンコードの種類．

Return values

MIME_ERR_ENCDE	(-1) エラー
MIME_UNKNOWN_ENCODE	( 0) 不明もしくはエンコードなし．
MIME_BASE64_ENCODE	( 1) MIME + BASE64
MIME_QUTDPRNTBL_ENCODE	( 2) MIME + quoted printable
MIME_URL_ENCODE	( 3) RFC2231 (URL encode)

Definition at line 512 of file mime_tool.c.

 {
     unsigned char* ps;
     unsigned char* pe;
  
     if (mime==NULL) return MIME_ERR_ENCODE;
  
     if ((ps=(unsigned char*)strstrcase((const char*)mime, MIME_BASE64))!=NULL) {
         if ((pe=(unsigned char*)strstr((const char*)mime, "?="))!=NULL) {
             if (pe>ps+strlen(MIME_BASE64)) {
                 return MIME_BASE64_ENCODE;
             }
         }
     }
  
     if (strstrcase(mime, MIME_QUTDPRNTBL)!=NULL) {
         return MIME_QUTDPRNTBL_ENCODE;
     }
  
     if (strstrcase(mime, MIME_RFC2231)!=NULL) {
         return MIME_URL_ENCODE;
     }
  
     return MIME_UNKNOWN_ENCODE;
 }

References MIME_BASE64, MIME_BASE64_ENCODE, MIME_ERR_ENCODE, MIME_QUTDPRNTBL, MIME_QUTDPRNTBL_ENCODE, MIME_RFC2231, MIME_UNKNOWN_ENCODE, MIME_URL_ENCODE, and strstrcase().

Referenced by decode_mime_string().

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◆ get_mime_filename()

tList* get_mime_filename	(	FILE *	fp,
		char *	bndry
	)

tList* get_mime_filename(FILE* fp, char* bndry)

ファイルから mime boundaryを探し出し，Content-Type行の内容をリストに格納して返す．複数行に渡る場合も結合して返す．

Parameters

fp	ファイルポインタ
bndry	'––' + MIMEの境界文字列

Returns: キー部にファイル名の入ったリスト

Definition at line 67 of file mime_tool.c.

 {
     tList* lp = NULL;
     tList* ln = NULL;
     char*  pt;
     Buffer mime, buf;
  
  
     fseek(fp, 0, SEEK_SET);
  
     buf = make_Buffer(LBUF);
     fgets_Buffer(&buf, fp);
     
     // ファイルから MIMEヘッダを抽出    
     while (!feof(fp)) {
         if (!strcmp((char*)buf.buf, bndry)) {   // mime boundary を見つけた
             fgets_Buffer(&buf, fp);
             while(!feof(fp)) {
                 ln = lp;
                 lp = get_protocol_header_list_seq(lp, buf, ';', FALSE, FALSE);
                 fgets_Buffer(&buf, fp);
                 if (ln==lp) break;
             } 
         }
         else {
             fgets_Buffer(&buf, fp);
         }
     }
     free_Buffer(&buf);
     lp = find_tList_top(lp);
  
     mime = init_Buffer();
  
     // MIME_CONTEMT_LINE を取り出す．
     if (lp!=NULL) {
         int  i, nn = 1;
         tList* lt = NULL;
         ln = NULL;
  
         Loop {
             mime = search_protocol_header(lp, (char*)MIME_CONTENT_LINE, nn);
             if (mime.buf==NULL) break;
             
             pt = strstrcase((char*)mime.buf, MIME_NAMEEQ_LINE);             // name=
             if (pt!=NULL) {
                 pt += strlen(MIME_NAMEEQ_LINE);
             }
             else {
                 pt = strstrcase((char*)mime.buf, MIME_FILENAMESTAR_LINE);   // filename*
                 if (pt!=NULL) {
                     i = 0;
                     while(pt[i]!='\0' && pt[i]!='=') i++;
                     if (pt[i]=='=') pt += i + 1;
                 }
             }
  
             if (pt!=NULL) {
                 pt = decode_mime_string(pt);                // デコード
                 if (pt!=NULL) {                             // リストに格納
                     lt = add_tList_node_str(lt, pt, NULL);
                     if (ln==NULL) ln = lt;
                     free(pt);
                 }
             }
  
             nn++;
             free_Buffer(&mime);
         }
     }
  
     del_all_tList(&lp);
     return ln;
 }

References add_tList_node_str, buf, Buffer::buf, decode_mime_string(), del_all_tList(), FALSE, fgets_Buffer(), find_tList_top(), free_Buffer(), get_protocol_header_list_seq(), init_Buffer(), LBUF, Loop, make_Buffer(), MIME_CONTENT_LINE, MIME_FILENAMESTAR_LINE, MIME_NAMEEQ_LINE, search_protocol_header(), and strstrcase().

Referenced by get_mime_filenameffn().

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◆ get_mime_filenameffn()

tList* get_mime_filenameffn	(	char *	fname,
		char *	bndry
	)

tList* get_mime_filenameffn(char* fname, char* bndry)

ファイルから mime boundaryを探し出し，CONTENT-TYPE行の内容をリストに格納して返す．複数行に渡る場合も結合して返す．

Parameters

fname	ファイル名
bndry	'––' + MIMEの境界文字列

Returns: キー部にファイル名の入ったリスト

Definition at line 153 of file mime_tool.c.

 {
     tList* lp;
     FILE*  fp;
  
     if (bndry==NULL) return NULL;
  
     fp = fopen(fname, "rb");
     if (fp==NULL) return NULL;
  
     lp = get_mime_filename(fp, bndry);
     fclose(fp);
  
     return lp;
 }

References get_mime_filename().

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Macros

Functions

Detailed Description

Macro Definition Documentation

◆ MIME_BASE64

◆ MIME_BASE64_ENCODE

◆ MIME_BOUNDARY_LINE

◆ MIME_CHARSET_ISO2022JP

◆ MIME_CONTENT_LINE

◆ MIME_CONTENTDSPO_LINE

◆ MIME_CONTENTTYPE_LINE

◆ MIME_ERR_ENCODE

◆ MIME_FILENAMEEQ_LINE

◆ MIME_FILENAMESTAR_LINE

◆ MIME_ISO2022JP_LINE

◆ MIME_NAMEEQ_LINE

◆ MIME_QUTDPRNTBL

◆ MIME_QUTDPRNTBL_ENCODE

◆ MIME_RFC2231

◆ MIME_UNKNOWN_ENCODE

◆ MIME_URL_ENCODE

Function Documentation

◆ decode_mime_rfc2047()

◆ decode_mime_rfc2231()

◆ decode_mime_string()

◆ encode_mime_string()

◆ get_mime_boundary()

◆ get_mime_enckind()

◆ get_mime_filename()

◆ get_mime_filenameffn()