我无法重写我从二进制缓冲区获取的文件,我已检查过原始文件并且所有字节都相同。
这是从NodeJS创建的文件:
# hd test.txt | head
00000000 47 49 46 38 39 61 32 00 32 00 f7 00 00 96 8c 73 |GIF89a2.2.�....s|
00000010 66 5e 45 c6 bb 9f 7b 72 5a 47 47 47 8a 81 65 ca |f^Eƻ.{rZGGG..e�|
00000020 c1 a6 c9 c1 ac ee ea dd c8 c5 bc 8c 87 7a d3 c9 |���������ż..z��|
00000030 ab 43 3b 26 eb e5 d1 fa fa fa e5 e4 e2 a6 9d 83 |�C;&����������..|
00000040 86 7e 67 c1 b4 8e e4 dc c6 82 82 82 e1 dd d1 e3 |.~g��.���...����|
00000050 dd ca e4 da bc f5 f1 e6 26 25 25 9c 91 73 f8 f3 |���ڼ���&%%..s��|
00000060 e4 c3 b9 9d d3 ca b4 4a 42 2a d1 c6 a2 6c 62 46 |�ù.�ʴJB*�ƢlbF|
00000070 ea e6 db bb b3 9c db d3 bb 5c 54 3d f1 ee e6 dc |��ۻ�.�ӻ\T=����|
00000080 da d3 e7 e4 dc ce c2 9f f8 f6 f2 76 6c 53 fc fb |�������.���vlS��|
00000090 f9 e9 e1 ca 17 13 09 67 4d 00 f8 f4 e8 dc d3 b5 |����...gM.����ӵ|
原来的那个:
$ hd runner_small.gif | head
00000000 47 49 46 38 39 61 32 00 32 00 f7 00 00 96 8c 73 |GIF89a2.2......s|
00000010 66 5e 45 c6 bb 9f 7b 72 5a 47 47 47 8a 81 65 ca |f^E...{rZGGG..e.|
00000020 c1 a6 c9 c1 ac ee ea dd c8 c5 bc 8c 87 7a d3 c9 |.............z..|
00000030 ab 43 3b 26 eb e5 d1 fa fa fa e5 e4 e2 a6 9d 83 |.C;&............|
00000040 86 7e 67 c1 b4 8e e4 dc c6 82 82 82 e1 dd d1 e3 |.~g.............|
00000050 dd ca e4 da bc f5 f1 e6 26 25 25 9c 91 73 f8 f3 |........&%%..s..|
00000060 e4 c3 b9 9d d3 ca b4 4a 42 2a d1 c6 a2 6c 62 46 |.......JB*...lbF|
00000070 ea e6 db bb b3 9c db d3 bb 5c 54 3d f1 ee e6 dc |.........\T=....|
00000080 da d3 e7 e4 dc ce c2 9f f8 f6 f2 76 6c 53 fc fb |...........vlS..|
00000090 f9 e9 e1 ca 17 13 09 67 4d 00 f8 f4 e8 dc d3 b5 |.......gM.......|
你可以比较这两个文件,每个字节是相同的,我猜测NodeJS的编码不正确。
这是一段代码
var foo = "71%73%70%56%57%97%50%0%50%0%247%0%0%150%140%115%102%94%69%198%187%159%123%114%90%71%71%71%138%129%101%202%193%166%201%193%172%238%234%221%200%197%188%140$
var bytes = foo.split("%");
var b = new Buffer(bytes.length);
for (var i = 0;i < bytes.length;i++) {
b[i] = bytes[i];
}
fs.writeFile("test.txt", b, "binary",function(err) {
if(err) {
console.log(err);
} else {
console.log("The file was saved!");
}
});
您可以尝试在NodeJS上运行它,看看结果是错误的。
我该怎么做才能解决它?
答案 0 :(得分:19)
我不确定这是否会有所帮助,但尝试将b变量更改为下面一行中的bytes变量,至少可以在测试编辑器中查看该文件
fs.writeFile("test.txt", b, "binary",function(err) { });
如果您希望将数字空格分开,请尝试以下代码:
var fs = require('fs');
var foo = "71%73%70%56%57%97%50%0%50%0%247%0%0%150%140%115%102%94%69%198%187%159%123%114%90%71%71%71%138%129%101%202%193%166%201%193%172%238%234%221%200%197%188%140"
var bytes = foo.split("%");
var b = new Buffer(bytes.length);
var c = "";
for (var i = 0;i < bytes.length;i++) {
b[i] = bytes[i];
c = c + " " + bytes[i]
}
fs.writeFile("test.txt", c, "binary",function(err) {
if(err) {
console.log(err);
} else {
console.log("The file was saved!");
}
});
答案 1 :(得分:2)
你可以试试这个:
int size = getFrames() * 4;
char * buffer = (char *) malloc(size);
char * data;
char * tmp;
for (loops = 100; loops > 0; loops--) {
buffer = getBuffer();
tmp = (char *) malloc(sizeof(data));
tmp = data;
data = (char *) malloc(sizeof(tmp) + sizeof(buffer));
data = strcat(tmp, buffer);
}
free(tmp);
free(data);
free(buffer);