javascript - How to decode base64 encoded image with JS/PHP? (previously encoded with Actionscript) -

-

i have image encoded base64, made actionscript function:

private static const base64_chars:string = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=";  public static function encodebytearray(_arg1:bytearray):string {    var _local3:array;    var _local5:uint;    var _local6:uint;    var _local7:uint;    var _local2 = "";    var _local4:array = new array(4);    _arg1.position = 0;    while (_arg1.bytesavailable > 0) {         _local3 = new array();         _local5 = 0;         while ((((_local5 < 3)) && ((_arg1.bytesavailable > 0)))) {             _local3[_local5] = _arg1.readunsignedbyte();             _local5++;         };         _local4[0] = ((_local3[0] & 252) >> 2);         _local4[1] = (((_local3[0] & 3) << 4) | (_local3[1] >> 4));         _local4[2] = (((_local3[1] & 15) << 2) | (_local3[2] >> 6));         _local4[3] = (_local3[2] & 63);         _local6 = _local3.length;         while (_local6 < 3) {             _local4[(_local6 + 1)] = 64;             _local6++;         };         _local7 = 0;         while (_local7 < _local4.length) {             _local2 = (_local2 + base64_chars.charat(_local4[_local7]));             _local7++;         };     };     return (_local2); }

now i'm trying decode (with no success) string in js/php , have image. here actionscript decoding function:

public static function decodetobytearray(_arg1:string):bytearray{     var _local6:uint;     var _local7:uint;     var _local2:bytearray = new bytearray();     var _local3:array = new array(4);     var _local4:array = new array(3);     var _local5:uint;     while (_local5 < _arg1.length) {         _local6 = 0;         while ((((_local6 < 4)) && (((_local5 + _local6) < _arg1.length)))) {             _local3[_local6] = base64_chars.indexof(_arg1.charat((_local5 + _local6)));             _local6++;         };         _local4[0] = ((_local3[0] << 2) + ((_local3[1] & 48) >> 4));         _local4[1] = (((_local3[1] & 15) << 4) + ((_local3[2] & 60) >> 2));         _local4[2] = (((_local3[2] & 3) << 6) + _local3[3]);         _local7 = 0;         while (_local7 < _local4.length) {             if (_local3[(_local7 + 1)] == 64){                 break;             };             _local2.writebyte(_local4[_local7]);             _local7++;         };         _local5 = (_local5 + 4);     };     _local2.position = 0;     return (_local2); }

i tried convert decoding aactionscript function js i'm missing new bytearray(); don't know how manage that. need way decode encoded image string image. here sample base64 string of image, encoded "encodebytearray" function:

sample base64 encoded string

thanks help.

to output base64 image use format:

<img src="data:image/png;base64,abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=" />

Comments

Post a Comment

Popular posts from this blog

python - Healpy: From Data to Healpix map -

-
Image
i have data grid rows represent theta (0, pi) , columns represent phi (0, 2*pi) , f(theta,phi) density of dark matter @ location. wanted calculate power spectrum , have decided use healpy. what can not understand how format data healpy use. if provide code (in python obvious reasons) or point me tutorial, great! have tried hand @ doing following code: #grid dimensions nrows*ncols (subject change) theta = np.linspace(0, np.pi, num=grid.shape[0])[:, none] phi = np.linspace(0, 2*np.pi, num=grid.shape[1]) nside = 512 print "pixel area: %.2f square degrees" % hp.nside2pixarea(nside, degrees=true) pix = hp.ang2pix(nside, theta, phi) healpix_map = np.zeros(hp.nside2npix(nside), dtype=np.double) healpix_map[pix] = grid but, when try execute code power spectrum. specifically, : cl = hp.anafast(healpix_map[pix], lmax=1024) i error: typeerror: bad number of pixels if point me tutorial or edit code great. more specifications: data in 2d np array , can change numrows/...
Read more

c - Bitwise operation with (signed) enum value -

-
i using enumerator values flags: typedef enum { = 0x00, b = 0x01u, // u has no influence, expected c = 0x02u, // u has no influence, expected ... } enum_name; volatile unsigned char* reg = someaddress; *reg |= b; according misra-c:2004 bitwise operations shall not done signed type. unfortunately, compiler iar use signed int (or short or char) underlying type of enums, , option can find relates size, not signedness ("--enum-is-int"). according iar c/c++ development guide arm , pages 169 , 211, can define type of enum s if enable iar language extensions ( -e command-line option, or project > options > c/c++ compiler > language > allow iar extensions in ide). in particular, should define "sentinel" value, make sure compiler chooses correct type. prefers signed types, , uses smallest possible integer type, sentinel should largest positive integer corresponding unsigned integer type can describe. example, typedef enum ...
Read more

xslt - Unnest parent nodes by child node -

-
in xml there items 0-n attributes , item should copied each attribute new item 1 attribute. given xml this: <?xml version="1.0" encoding="utf-8" ?> <items> <item> <name>a</name> <attributes> <attribute> <key>attribute1</key> <value>1</value> </attribute> </attributes> </item> <item> <name>b</name> </item> <item> <name>c</name> <attributes> <attribute> <key>attribute1</key> <value>5</value> </attribute> <attribute> <key>attribute2</key> <value>2</value> </attribute> <attribute> <key>attri...
Read more