com.ailyr.tool.extra.servlet.multipart.UploadFileHeader Maven / Gradle / Ivy
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package com.ailyr.tool.extra.servlet.multipart;
import com.ailyr.tool.core.io.FileUtil;
import com.ailyr.tool.core.util.StrUtil;
/**
* 上传的文件的头部信息
* 来自Jodd
*
* @author jodd.org
*/
public class UploadFileHeader {
// String dataHeader;
String formFieldName;
String formFileName;
String path;
String fileName;
boolean isFile;
String contentType;
String mimeType;
String mimeSubtype;
String contentDisposition;
UploadFileHeader(String dataHeader) {
processHeaderString(dataHeader);
}
// ---------------------------------------------------------------- public interface
/**
* Returns true if uploaded data are correctly marked as a file. This is true if header contains string 'filename'.
*/
public boolean isFile() {
return isFile;
}
/**
* Returns form field name.
*/
public String getFormFieldName() {
return formFieldName;
}
/**
* Returns complete file name as specified at client side.
*/
public String getFormFileName() {
return formFileName;
}
/**
* Returns file name (base name and extension, without full path data).
*/
public String getFileName() {
return fileName;
}
/**
* Returns uploaded content type. It is usually in the following form:
* mime_type/mime_subtype.
*
* @see #getMimeType()
* @see #getMimeSubtype()
*/
public String getContentType() {
return contentType;
}
/**
* Returns file types MIME.
*/
public String getMimeType() {
return mimeType;
}
/**
* Returns file sub type MIME.
*/
public String getMimeSubtype() {
return mimeSubtype;
}
/**
* Returns content disposition. Usually it is 'form-data'.
*/
public String getContentDisposition() {
return contentDisposition;
}
// ---------------------------------------------------------------- Private Method
/**
* 获得头信息字符串字符串中指定的值
*
* @param dataHeader 头信息
* @param fieldName 字段名
* @return 字段值
*/
private String getDataFieldValue(String dataHeader, String fieldName) {
String value = null;
String token = StrUtil.format("{}=\"", fieldName);
int pos = dataHeader.indexOf(token);
if (pos > 0) {
int start = pos + token.length();
int end = dataHeader.indexOf('"', start);
if ((start > 0) && (end > 0)) {
value = dataHeader.substring(start, end);
}
}
return value;
}
/**
* 头信息中获得content type
*
* @param dataHeader data header string
* @return content type or an empty string if no content type defined
*/
private String getContentType(String dataHeader) {
String token = "Content-Type:";
int start = dataHeader.indexOf(token);
if (start == -1) {
return StrUtil.EMPTY;
}
start += token.length();
return dataHeader.substring(start);
}
private String getContentDisposition(String dataHeader) {
int start = dataHeader.indexOf(':') + 1;
int end = dataHeader.indexOf(';');
return dataHeader.substring(start, end);
}
private String getMimeType(String ContentType) {
int pos = ContentType.indexOf('/');
if (pos == -1) {
return ContentType;
}
return ContentType.substring(1, pos);
}
private String getMimeSubtype(String ContentType) {
int start = ContentType.indexOf('/');
if (start == -1) {
return ContentType;
}
start++;
return ContentType.substring(start);
}
/**
* 处理头字符串，使之转化为字段
* @param dataHeader
*/
private void processHeaderString(String dataHeader) {
isFile = dataHeader.indexOf("filename") > 0;
formFieldName = getDataFieldValue(dataHeader, "name");
if (isFile) {
formFileName = getDataFieldValue(dataHeader, "filename");
if (formFileName == null) {
return;
}
if (formFileName.length() == 0) {
path = StrUtil.EMPTY;
fileName = StrUtil.EMPTY;
}
int ls = FileUtil.lastIndexOfSeparator(formFileName);
if (ls == -1) {
path = StrUtil.EMPTY;
fileName = formFileName;
} else {
path = formFileName.substring(0, ls);
fileName = formFileName.substring(ls);
}
if (fileName.length() > 0) {
this.contentType = getContentType(dataHeader);
mimeType = getMimeType(contentType);
mimeSubtype = getMimeSubtype(contentType);
contentDisposition = getContentDisposition(dataHeader);
}
}
}
}