Sun RPC:传输二进制文件
我想将二进制文件传输到远程服务器。我的代码使用SUN/oncpc(Linux上的rpcgen)。我使用的是C语言。我已经为服务器和客户端编写了代码,它可以用于文本文件,但当我尝试传输二进制文件时,它会说文件在传输后已损坏。我将数据块存储在字符数组或XDR字符串中。我认为将数据存储为字符数组存在一些问题。谁能告诉我是什么问题吗?谁能帮帮我吗 如果有人想看看我在做什么,我将把我的代码片段附加在这里以供参考 我的IDL:Sun RPC:传输二进制文件,c,ftp,rpc,sunrpc,C,Ftp,Rpc,Sunrpc,我想将二进制文件传输到远程服务器。我的代码使用SUN/oncpc(Linux上的rpcgen)。我使用的是C语言。我已经为服务器和客户端编写了代码,它可以用于文本文件,但当我尝试传输二进制文件时,它会说文件在传输后已损坏。我将数据块存储在字符数组或XDR字符串中。我认为将数据存储为字符数组存在一些问题。谁能告诉我是什么问题吗?谁能帮帮我吗 如果有人想看看我在做什么,我将把我的代码片段附加在这里以供参考 我的IDL: const MAXLEN = 1024; /* * Type for sto
const MAXLEN = 1024;
/*
* Type for storing path
*/
typedef string filename<MAXLEN>;
/*
* Structure for sending request. Expects the path of the file
* and the byte number at which to start reading the file from
*/
struct request {
filename name;
int start;
};
/*
* Type that represents the structute for request
*/
typedef struct request request;
/*
* Type for storing a chunk of the file that is being
* sent from the server to the client in the current
* remote procedure call
*/
typedef string filechunk<MAXLEN>;
/*
* Response sent by the server to the client as a response
* to remote procedure call, containing the filechunk for
* the current call and number of bytes actually read
*/
struct chunkreceive {
filechunk data;
int bytes;
};
/*
* Type that represents the structure for file's chunks
* to be received from the server
*/
typedef struct chunkreceive chunkreceive;
/*
* File data sent by the server from client to store
* it on the server along with the filename and the
* number of bytes in the data
*/
struct chunksend {
filename name;
filechunk data;
int bytes;
};
/*
* Type that represents the structure for file's chunks
* to be sent to the server
*/
typedef struct chunksend chunksend;
/*
* union for returning from remote procedure call, returns
* the proper chunkdata response if everything worked fine
* or will return the error number if an error occured
*/
union readfile_res switch (int errno) {
case 0:
chunkreceive chunk;
default:
void;
};
/*
* Remote procedure defined in the Interface Definition Language
* of SUN RPC, contains PROGRAM and VERSION name definitions and
* the remote procedure signature
*/
program FTPPROG {
version FTPVER {
readfile_res retrieve_file(request *) = 1;
int send_file(chunksend *) = 2;
} = 1;
} = 0x20000011;
const MAXLEN=1024;
/*
*用于存储路径的类型
*/
typedef字符串文件名;
/*
*用于发送请求的结构。需要文件的路径
*以及从中开始读取文件的字节数
*/
结构请求{
文件名;
int启动;
};
/*
*表示请求的结构的类型
*/
typedef结构请求;
/*
*用于存储正在处理的文件块的类型
*从服务器发送到当前服务器中的客户端
*远程过程调用
*/
typedef字符串文件块;
/*
*服务器作为响应发送到客户端的响应
*到远程过程调用,其中包含
*当前调用和实际读取的字节数
*/
结构块接收{
文件块数据;
整数字节;
};
/*
*表示文件块结构的类型
*要从服务器接收的
*/
typedef结构chunkreceive chunkreceive;
/*
*服务器从客户端发送到存储区的文件数据
*它与文件名和
*数据中的字节数
*/
结构块发送{
文件名;
文件块数据;
整数字节;
};
/*
*表示文件块结构的类型
*要发送到服务器
*/
typedef结构chunksend chunksend;
/*
*用于从远程过程调用返回的联合,返回
*如果一切正常,正确的数据响应
*或在发生错误时返回错误号
*/
union readfile_res开关(int errno){
案例0:
分块接收分块;
违约:
无效的
};
/*
*用接口定义语言定义的远程过程
*包含程序和版本名定义以及
*远程过程签名
*/
程序FTPPROG{
版本FTPVER{
readfile\u res retrieve\u file(请求*)=1;
int send_文件(chunksend*)=2;
} = 1;
}=0x2000011;
我的服务器:
#include <rpc/rpc.h>
#include <stdio.h>
#include "ftp.h"
extern __thread int errno;
readfile_res* retrieve_file_1_svc(request *req, struct svc_req *rqstp)
{
FILE *file;
char data[1024];
int bytes;
static readfile_res res;
file = fopen(req->name, "rb");
if (file == NULL) {
res.errno = errno;
return (&res);
}
fseek (file, req->start, SEEK_SET);
bytes = fread(data, 1, 1024, file);
res.readfile_res_u.chunk.data = data;
res.readfile_res_u.chunk.bytes = bytes;
/*
* Return the result
*/
res.errno = 0;
fclose(file);
return (&res);
}
int* send_file_1_svc(chunksend *rec, struct svc_req *rqstp)
{
FILE *file;
int write_bytes;
static int result;
file = fopen(rec->name, "a");
if (file == NULL) {
result = errno;
return &result;
}
write_bytes = fwrite(rec->data, 1, rec->bytes, file);
fclose(file);
result = 0;
return &result;
}
#包括
#包括
#包括“ftp.h”
外部线程内部错误号;
readfile\U res*检索\U file\U 1\U svc(请求*req,结构svc\U req*rqstp)
{
文件*文件;
字符数据[1024];
整数字节;
静态读取文件;
文件=fopen(请求->名称,“rb”);
if(file==NULL){
res.errno=errno;
返回(&res);
}
fseek(文件,请求->开始,搜索设置);
字节=fread(数据,1024,文件);
res.readfile_res_.chunk.data=数据;
res.readfile_res_.chunk.bytes=字节;
/*
*返回结果
*/
res.errno=0;
fclose(文件);
返回(&res);
}
int*send\u file\u 1\u svc(chunksend*rec,struct svc\u req*rqstp)
{
文件*文件;
int写入字节;
静态int结果;
file=fopen(rec->name,“a”);
if(file==NULL){
结果=错误号;
返回和结果;
}
write_bytes=fwrite(记录->数据,1,记录->字节,文件);
fclose(文件);
结果=0;
返回和结果;
}
我的客户:
#include <rpc/rpc.h>
#include <stdio.h>
#include <string.h>
#include "ftp.h"
extern __thread int errno;
int get_file(char *host, char *name)
{
CLIENT *clnt;
int total_bytes = 0, write_bytes;
readfile_res *result;
request req;
FILE *file;
req.name = name;
req.start = 0;
/*
* Create client handle used for calling FTPPROG on
* the server designated on the command line. Use
* the tcp protocol when contacting the server.
*/
clnt = clnt_create(host, FTPPROG, FTPVER, "tcp");
if (clnt == NULL) {
/*
* Couldn't establish connection with server.
* Print error message and stop.
*/
clnt_pcreateerror(host);
exit(1);
}
file = fopen(name, "wb");
/*
* Call the remote procedure readdir on the server
*/
while (1) {
req.start = total_bytes;
result = retrieve_file_1(&req, clnt);
if (result == NULL) {
/*
* An RPC error occurred while calling the server.
* Print error message and stop.
*/
clnt_perror(clnt, host);
exit(1);
}
/*
* Okay, we successfully called the remote procedure.
*/
if (result->errno != 0) {
/*
* A remote system error occurred.
* Print error message and stop.
*/
errno = result->errno;
perror(name);
exit(1);
}
/*
* Successfully got a chunk of the file.
* Write into our local file.
*/
write_bytes = fwrite(result->readfile_res_u.chunk.data, 1, result->readfile_res_u.chunk.bytes, file);
total_bytes += result->readfile_res_u.chunk.bytes;
if (result->readfile_res_u.chunk.bytes < MAXLEN)
break;
}
fclose(file);
return 0;
}
int put_file(char *host, char *name)
{
CLIENT *clnt;
char data[1024];
int total_bytes = 0, read_bytes;
int *result;
chunksend chunk;
FILE *file;
/*
* Create client handle used for calling FTPPROG on
* the server designated on the command line. Use
* the tcp protocol when contacting the server.
*/
clnt = clnt_create(host, FTPPROG, FTPVER, "tcp");
if (clnt == NULL) {
/*
* Couldn't establish connection with server.
* Print error message and stop.
*/
clnt_pcreateerror(host);
exit(1);
}
file = fopen(name, "r");
chunk.name = name;
/*
* Call the remote procedure readdir on the server
*/
while (1) {
read_bytes = fread(data, 1, MAXLEN, file);
total_bytes += read_bytes;
chunk.data = data;
chunk.bytes = read_bytes;
result = send_file_1(&chunk, clnt);
if (result == NULL) {
/*
* An RPC error occurred while calling the server.
* Print error message and stop.
*/
clnt_perror(clnt, host);
exit(1);
}
/*
* Okay, we successfully called the remote procedure.
*/
if (*result != 0) {
/*
* A remote system error occurred.
* Print error message and stop.
*/
errno = *result;
perror(name);
exit(1);
}
/*
* Successfully got a chunk of the file.
* Write into our local file.
*/
if (read_bytes < MAXLEN)
break;
}
fclose(file);
return 0;
}
int read_command(char *host)
{
char command[MAXLEN], filepath[MAXLEN];
printf("> ");
fflush(stdin);
scanf("%s %s", command, filepath);
if (strcmp(command, "get") == 0) {
return get_file(host, filepath);
} else if(strcmp(command, "put") == 0){
return put_file(host, filepath);
} else if(strcmp(command, "exit") == 0){
exit(0);
} else {
return -1;
}
}
int main(int argc, char *argv[])
{
int result;
if (argc != 2) {
fprintf(stderr, "usage: %s host\n", argv[0]);
exit(1);
}
while(TRUE) {
result = read_command(argv[1]);
}
return 0;
}
#包括
#包括
#包括
#包括“ftp.h”
外部线程内部错误号;
int get_文件(字符*主机,字符*名称)
{
客户*clnt;
int total_bytes=0,write_bytes;
readfile_res*结果;
请求请求;
文件*文件;
req.name=名称;
req.start=0;
/*
*创建用于在上调用FTPPROG的客户端句柄
*在命令行上指定的服务器。使用
*与服务器联系时使用tcp协议。
*/
clnt=clnt_create(主机、FTPPROG、FTPVER、“tcp”);
如果(clnt==NULL){
/*
*无法与服务器建立连接。
*打印错误消息并停止。
*/
clnt_pcreateerror(主机);
出口(1);
}
文件=fopen(名称,“wb”);
/*
*在服务器上调用远程过程readdir
*/
而(1){
req.start=总字节数;
结果=检索文件1(&req,clnt);
如果(结果==NULL){
/*
*调用服务器时发生RPC错误。
*打印错误消息并停止。
*/
clnt_perror(clnt,主机);
出口(1);
}
/*
*好的,我们成功地调用了远程过程。
*/
如果(结果->错误号!=0){
/*
*发生远程系统错误。
*打印错误消息并停止。
*/
errno=结果->errno;
佩罗尔(姓名);
出口(1);
}
/*
*已成功获取文件的一块。
*写入本地文件。
*/
write_bytes=fwrite(结果->readfile_res_.chunk.data,1,结果->readfile_res_.chunk.bytes,文件);
总字节数+=结果->读取文件\u res\u.chunk.bytes;
如果(结果->读取文件\u res\u.chunk.bytes*bytes = fread(data, 1, 1024, file);
res.readfile_res_u.chunk.data = data;*
*bytes = fread(res.readfile_res_u.chunk.data, 1, 1024, file);*